
The percentage of people testing positive for coronavirus (COVID19) continued to decrease in England, Wales, Northern Ireland and Scotland.

In England, we estimate that the number of people testing positive for COVID19 was 1,204,100 (95% credible interval: 1,142,200 to 1,269,800), equating to 2.21% of the population or around 1 in 45 people.

In Wales, we estimate that the number of people testing positive for COVID19 was 88,300 (95% credible interval: 72,800 to 105,300), equating to 2.91% of the population or around 1 in 35 people.

In Northern Ireland, we estimate that the number of people testing positive for COVID19 was 33,800 (95% credible interval: 24,600 to 43,900), equating to 1.84% of the population or around 1 in 55 people.

In Scotland, we estimate that the number of people testing positive for COVID19 was 158,200 (95% credible interval: 135,400 to 181,800), equating to 3.01% of the population or around 1 in 35 people.
Results  weekly swab positivity updates from ONS
Every week, estimates of positivity rates and incidence are published in Office for National Statistics bulletins  summarised below.
Weekly swab positivity updates  2020
Weekly swab positivity updates  JanJun 2021
Weekly swab positivity updates  JulDec 2021
13 May 2022  weekly update
In the most recent week, ending 7 May 2022:
6 May 2022  weekly update

The percentage of people testing positive for coronavirus (COVID19) continued to decrease in England, Wales and Scotland, and decreased in Northern Ireland, in the latest week.

In England, we estimate that 1,586,900 people had COVID19 (95% credible interval: 1,516,200 to 1,659,000) in the week ending 30 April 2022, equating to 2.91% of the population or around 1 in 35 people.

In Wales, we estimate that 131,600 people had COVID19 (95% credible interval: 112,200 to 152,800) in the week ending 30 April 2022, equating to 4.33% of the population or around 1 in 25 people.

In Northern Ireland, we estimate that 44,900 people had COVID19 (95% credible interval: 34,800 to 56,300) in the week ending 30 April 2022, equating to 2.45% of the population or around 1 in 40 people.

In Scotland, we estimate that 186,700 people had COVID19 (95% credible interval: 161,800 to 214,300) in the week ending 1 May 2022, equating to 3.55% of the population or around 1 in 30 people.
29 April 2022  weekly update
In the week ending 23 April 2022:

The percentage of people testing positive for coronavirus (COVID19) continued to decrease in England, Wales and Scotland, and the trend was uncertain in Northern Ireland.

In England, we estimate that 2,408,300 people had COVID19 (95% credible interval: 2,326,300 to 2,494,500), equating to 4.42% of the population or around 1 in 25 people.

In Wales, we estimate that 172,300 people had COVID19 (95% credible interval: 151,300 to 194,700), equating to 5.67% of the population or around 1 in 18 people.

In Northern Ireland, we estimate that 74,700 people had COVID19 (95% credible interval: 60,500 to 91,700), equating to 4.07% of the population or around 1 in 25 people.

In Scotland, we estimate that 218,000 people had COVID19 (95% credible interval: 193,800 to 243,600), equating to 4.14% of the population or around 1 in 25 people.
22 April 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) continued to decrease in the week ending 16 April 2022; we estimate that 3,218,700 people in England had COVID19 (95% credible interval: 3,120,200 to 3,317,200), equating to 5.90% of the population or around 1 in 17 people.

In Wales, the percentage of people testing positive for COVID19 decreased in the week ending 16 April 2022; we estimate that 198,400 people in Wales had COVID19 (95% credible interval: 175,100 to 222,600), equating to 6.53% of the population or around 1 in 15 people.

In Northern Ireland, the percentage of people testing positive for COVID19 continued to decrease in the week ending 16 April 2022; we estimate that 65,300 people in Northern Ireland had COVID19 (95% credible interval: 52,300 to 79,800), equating to 3.56% of the population or around 1 in 30 people.

In Scotland, the percentage of people testing positive for COVID19 continued to decrease in the week ending 16 April 2022; we estimate that 281,400 people in Scotland had COVID19 (95% credible interval: 253,100 to 311,700), equating to 5.35% of the population or around 1 in 19 people.
14 April 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) decreased in the week ending 9 April 2022; we estimate that 3,773,800 people in England had COVID19 (95% credible interval: 3,662,100 to 3,888,000), equating to 6.92% of the population or around 1 in 14 people.

In Wales, the percentage of people testing positive for COVID19 remained high in the most recent week (up to 9 April 2022); we estimate that 231,900 people in Wales had COVID19 (95% credible interval: 206,200 to 259,800), equating to 7.63% of the population or around 1 in 13 people.

In Northern Ireland, the trend in the percentage of people testing positive for COVID19 decreased in the week ending 9 April 2022; we estimate that 95,900 people in Northern Ireland had COVID19 (95% credible interval: 78,800 to 114,000), equating to 5.23% of the population or around 1 in 19 people.

In Scotland, the percentage of people testing positive for COVID19 continued to decrease in the week ending 9 April 2022; we estimate that 314,800 people in Scotland had COVID19 (95% credible interval: 281,400 to 348,700), equating to 5.98% of the population or around 1 in 17 people.
8 April 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) remained high in the week ending 2 April 2022; we estimate that 4,141,600 people in England had COVID19 (95% credible interval: 4,033,600 to 4,249,500), equating to 7.60% of the population or around 1 in 13 people.

In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 2 April 2022; we estimate that 230,800 people in Wales had COVID19 (95% credible interval: 208,900 to 253,100), equating to 7.59% of the population or around 1 in 13 people.

In Northern Ireland, the trend in the percentage of people testing positive for COVID19 was uncertain in the week ending 2 April 2022; we estimate that 113,900 people in Northern Ireland had COVID19 (95% credible interval: 97,100 to 131,500), equating to 6.21% of the population or around 1 in 16 people.

In Scotland, the percentage of people testing positive for COVID19 decreased in the week ending 3 April 2022; we estimate that 396,800 people in Scotland had COVID19 (95% credible interval: 359,800 to 434,200), equating to 7.54% of the population or around 1 in 13 people.

In the week ending 3 April 2022, the Omicron BA.2 variant remained the dominant variant across all UK countries; the percentage of people with infections compatible with the Omicron BA.2 variant remained high in England and continued to increase in Wales, however the trend was uncertain in Scotland and Northern Ireland.
1 April 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) continued to increase in the week ending 26 March 2022; we estimate that 4,122,700 people in England had COVID19 (95% credible interval: 4,013,600 to 4,228,300), equating to 7.56% of the population or around 1 in 13 people.

In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 26 March 2022; we estimate that 212,000 people in Wales had COVID19 (95% credible interval: 189,800 to 234,800), equating to 6.97% of the population or around 1 in 14 people.

In Northern Ireland, the trend in the percentage of people testing positive for COVID19 was uncertain in the week ending 26 March 2022; we estimate that 123,000 people in Northern Ireland had COVID19 (95% credible interval: 105,900 to 141,000), equating to 6.70% of the population or around 1 in 15 people.

In Scotland, the percentage of people testing positive for COVID19 increased in the two weeks up to 26 March 2022, however the trend was uncertain in the most recent week; we estimate that 451,200 people in Scotland had COVID19 (95% credible interval: 415,500 to 487,900), equating to 8.57% of the population or around 1 in 12 people.

In the week ending 26 March 2022, the percentage of people with infections compatible with the Omicron BA.2 variant increased in England and Wales, however the trend was uncertain in Scotland and Northern Ireland.
25 March 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) continued to increase in the week ending 19 March 2022; we estimate that 3,485,700 people in England had COVID19 (95% credible interval: 3,387,500 to 3,585,800), equating to 6.39% of the population or around 1 in 16 people.

In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 19 March 2022; we estimate that 192,900 people in Wales had COVID19 (95% credible interval: 170,900 to 216,800), equating to 6.35% of the population or around 1 in 16 people.

In Northern Ireland, the percentage of people testing positive for COVID19 decreased in the week ending 19 March 2022; we estimate that 108,700 people in Northern Ireland had COVID19 (95% credible interval: 92,500 to 126,000), equating to 5.92% of the population or around 1 in 17 people.

In Scotland, the percentage of people testing positive for COVID19 continued to increase in the week ending 20 March 2022; we estimate that 473,800 people in Scotland had COVID19 (95% credible interval: 436,100 to 512,500), equating to 9.00% of the population or around 1 in 11 people.

In the week ending 20 March 2022, the percentage of people with infections compatible with the Omicron BA.2 variant increased in England, Wales and Scotland and decreased in Northern Ireland.
18 March 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) continued to increase in the week ending 12 March 2022; we estimate that 2,653,200 people in England had COVID19 (95% credible interval: 2,571,500 to 2,739,700), equating to 4.87% of the population or around 1 in 20 people.

In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 12 March 2022; we estimate that 125,400 people in Wales had COVID19 (95% credible interval: 108,100 to 144,900), equating to 4.13% of the population or around 1 in 25 people.

In Northern Ireland, the percentage of people testing positive for COVID19 increased in the two weeks up to 12 March 2022, but the trend was uncertain in the most recent week; we estimate that 130,600 people in Northern Ireland had COVID19 (95% credible interval: 113,100 to 149,100), equating to 7.12% of the population or around 1 in 14 people.

In Scotland, the percentage of people testing positive for COVID19 continued to increase in the week ending 12 March 2022; we estimate that 376,300 people in Scotland had COVID19 (95% credible interval: 345,400 to 409,900), equating to 7.15% of the population or around 1 in 14 people.

In the week ending 12 March 2022, the percentage of infections compatible with the Omicron BA.2 variant increased in England, Wales and Scotland and the trend was uncertain in Northern Ireland; the percentage of infections compatible with the Omicron BA.1 variant decreased in England, Northern Ireland and Scotland and the trend was uncertain in Wales.
11 March 2022  weekly update
 In England, the percentage of people testing positive for coronavirus (COVID19) increased in the week ending 5 March 2022; we estimate that 2,073,900 people in England had COVID19 (95% credible interval 1,992,700 to 2,155,900), equating to 3.80% of the population or around 1 in 25 people.
 In Wales, the percentage of people testing positive for COVID19 increased in the week ending 5 March 2022; we estimate that 97,900 people in Wales had COVID19 (95% credible interval: 83,000 to 114,500), equating to 3.22% of the population or around 1 in 30 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 increased in the week ending 5 March 2022; we estimate that 143,800 people in Northern Ireland had COVID19 (95% credible interval: 124,700 to 163,900), equating to 7.84% of the population or around 1 in 13 people.
 In Scotland, the percentage of people testing positive for COVID19 continued to increase in the week ending 6 March 2022; we estimate that 299,900 people in Scotland had COVID19 (95% credible interval: 270,200 to 332,300), equating to 5.70% of the population or around 1 in 18 people.
 In the week ending 5 March 2022 (6 March 2022 for Scotland), the percentage of infections compatible with the Omicron BA.2 variant increased in England, Wales, Northern Ireland and Scotland; the percentage of infections compatible with the Omicron BA.1 variant decreased in England, Wales and Scotland and the trend was uncertain in Northern Ireland.
4 March 2022  weekly update

In England, the percentage of people testing positive for coronavirus (COVID19) continued to decrease in the week ending 26 February 2022; we estimate that 1,933,500 people in England had COVID19 (95% credible interval 1,861,700 to 1,992,300), equating to 3.55% of the population or around 1 in 30 people.

In Wales, the percentage of people testing positive for COVID19 decreased in the two weeks up to 26 February 2022, but the trend was uncertain in the most recent week; we estimate that 94,200 people in Wales had COVID19 (95% credible interval: 80,000 to 109,700), equating to 3.10% of the population or around 1 in 30 people.

In Northern Ireland, the percentage of people testing positive for COVID19 decreased in the week ending 26 February 2022; we estimate that 106,300 people in Northern Ireland had COVID19 (95% credible interval: 90,700 to 123,700), equating to 5.79% of the population or around 1 in 17 people.

In Scotland, the percentage of people testing positive for COVID19 increased in the week ending 26 February 2022; we estimate that 280,500 people in Scotland had COVID19 (95% credible interval: 251,800 to 311,900), equating to 5.33% of the population or around 1 in 19 people.

In the week ending the 26 February 2022, the percentage of infections compatible with the Omicron BA.2 variant increased in England, Wales, and Scotland and decreased in Northern Ireland; the percentage of cases compatible with the Omicron BA.1 variant decreased in England, Wales, and Northern Ireland and increased in Scotland over the same period.
25 February 2022  weekly update
More details on the data to 19/20 February 2022.
23 February 2022  weekly update
In the week ending 19 February 2022 (20 February 2022 for Scotland):

In England, the percentage of people testing positive for coronavirus (COVID19) continued to decrease in the week ending 19 February 2022; we estimate that 2,096,200 people in England had COVID19 (95% credible interval: 2,015,100 to 2,175,600), equating to around 1 in 25 people.

In Wales, the percentage of people testing positive for COVID19 decreased in the two weeks up to 19 February 2022, but the trend was uncertain in the most recent week; we estimate that 98,200 people in Wales had COVID19 (95% credible interval: 83,100 to 114,900), equating to around 1 in 30 people.

In Northern Ireland, the percentage of people testing positive for COVID19 decreased in the two weeks up to 19 February 2022, but the trend was uncertain in the most recent week; we estimate that 132,700 people in Northern Ireland had COVID19 (95% credible interval: 115,900 to 150,900), equating to around 1 in 14 people.

In Scotland, the percentage of people testing positive for COVID19 increased in the week ending 20 February 2022; we estimate that 240,700 people in Scotland had COVID19 (95% credible interval: 215,100 to 269,400), equating to around 1 in 20 people.

The percentage of people testing positive for COVID19 decreased in all regions of England except the South East where the trend was uncertain in the week ending 19 February 2022.

In England, the percentage of people testing positive for COVID19 varied across age groups, with the highest for those aged 2 years to school Year 6 at 4.84% (95% confidence interval: 4.23% to 5.50%) and lowest for those aged 70 years and over at 2.08% (95% confidence interval: 1.87% to 2.32%), in the week ending 19 February 2022.
18 February 2022  weekly update
More details on the data to 12/13 February 2022.
16 February 2022  interim update
In the week ending 12 February 2022 (13 February 2022 for Scotland):

In England, the percentage of people testing positive for coronavirus (COVID19) decreased in the week ending 12 February 2022; we estimate that 2,449,100 people in England had COVID19 (95% credible interval: 2,368,200 to 2,532,600), equating to around 1 in 20 people.

In Wales, the percentage of people testing positive for COVID19 continued to decrease in the week ending 12 February 2022; we estimate that 112,600 people in Wales had COVID19 (95% credible interval: 96,900 to 129,900), equating to around 1 in 25 people.

In Northern Ireland, the percentage of people testing positive for COVID19 increased in the two weeks up to 12 February 2022, but the trend was uncertain in the most recent week; we estimate that 146,600 people in Northern Ireland had COVID19 (95% credible interval: 129,400 to 164,800), equating to around 1 in 13 people.

In Scotland, the percentage of people testing positive for COVID19 increased in the two weeks up to 13 February 2022, but the trend was uncertain in the most recent week; we estimate that 219,300 people in Scotland had COVID19 (95% credible interval: 194,500 to 244,300), equating to around 1 in 25 people.

The percentage of people testing positive for COVID19 decreased in all regions except the South West where the trend was uncertain in the week ending 12 February 2022.

In England, the percentage of people testing positive for COVID19 varied substantially across age groups, with the highest for those aged 2 years to school Year 6 at 7.60% (95% confidence interval: 6.89% to 8.35%) and lowest for those aged 70 years and over at 2.23% (95% confidence interval: 2.03% to 2.45%), in the week ending 12 February 2022.
11 February 2022  weekly update
More details on the data to 9 February 2022.
9 February 2022  interim update
In the week ending 5 February 2022:
 In England, the percentage of people testing positive for coronavirus (COVID19) increased in the two weeks up to 5 February 2022, but the trend was uncertain in the most recent week; we estimate that 2,824,700 people in England had COVID19 (95% credible interval: 2,740,300 to 2,910,300), equating to around 1 in 19 people.
 In Wales, the percentage of people testing positive for COVID19 decreased in the week ending 5 February 2022; we estimate that 121,200 people in Wales had COVID19 (95% credible interval: 104,000 to 139,900), equating to around 1 in 25 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 continued to increase in the week ending 5 February 2022; we estimate that 145,600 people in Northern Ireland had COVID19 (95% credible interval: 126,800 to 165,200), equating to around 1 in 13 people.
 In Scotland, the percentage of people testing positive for COVID19 increased in the week ending 5 February 2022; we estimate that 211,300 people in Scotland had COVID19 (95% credible interval: 189,500 to 235,100), equating to around 1 in 25 people.
 In England, the percentage of people testing positive for COVID19 varied substantially across age groups, with the highest for those aged 2 years to school Year 6 at 11.46% (95% confidence interval: 10.56% to 12.39%) and lowest for those aged 70 years and over at 2.50% (95% confidence interval: 2.28% to 2.72%), in the week ending 5 February 2022.
 The percentage of people testing positive for COVID19 remained high across all regions of England in the week ending 5 February 2022.
2 February 2022  weekly update
More details on the data to 29 January 2022
2 February 2022  interim update
In the week ending 29 January 2022:

In England, the percentage of people testing positive for coronavirus (COVID19) remained high in the week ending 29 January 2022; we estimate that 2,633,100 people in England had COVID19 (95% credible interval: 2,544,100 to 2,725,100), equating to around 1 in 20 people.

In Wales, the percentage of people testing positive for COVID19 increased in the week ending 29 January 2022; we estimate that 139,000 people in Wales had COVID19 (95% credible interval: 119,800 to 159,300), equating to around 1 in 20 people.

In Northern Ireland, the percentage of people testing positive for COVID19 increased in the week ending 29 January 2022; we estimate that 136,300 people in Northern Ireland had COVID19 (95% credible interval: 118,200 to 155,200), equating to around 1 in 15 people.

In Scotland, the percentage of people testing positive for COVID19 decreased in the two weeks up to 29 January 2022, but the trend was uncertain in the most recent week; we estimate that 185,100 people in Scotland had COVID19 (95% credible interval: 162,100 to 210,800), equating to around 1 in 30 people.

In England, the percentage of people testing positive for COVID19 varied substantially across age groups, with the highest for those aged 2 to school Year 6 at 13.09% (95% confidence interval: 12.13% to 14.07%) and lowest for those aged 70 and over at 1.97% (95% confidence interval: 1.78% to 2.17%), in the week ending 29 January 2022.

The percentage of people testing positive for COVID19 remained high across all regions of England in the week ending 29 January 2022.
28 January 2022  weekly update
More details on the data to 22 January 2022
26 January 2022  interim update
In the week ending 22 January 2022:
 In England, the percentage of people testing positive for coronavirus (COVID19) continued to decrease in the week ending 22 January 2022; we estimate that 2,629,400 people in England had COVID19 (95% credible interval: 2,542,500 to 2,716,500), equating to around 1 in 20 people.
 In Wales, the percentage of people testing positive for COVID19 continued to decrease in the week ending 22 January 2022; we estimate that 99,500 people in Wales had COVID19 (95% credible interval: 83,300 to 117,100), equating to around 1 in 30 people.
 In Northern Ireland, the trend in the percentage of people testing positive for COVID19 was uncertain in the week ending 22 January 2022; we estimate that 96,500 people in Northern Ireland had COVID19 (95% credible interval: 81,600 to 112,700), equating to around 1 in 20 people.
 In Scotland, the percentage of people testing positive for COVID19 continued to decrease in the week ending 22 January 2022; we estimate that 163,600 people in Scotland had COVID19 (95% credible interval: 143,600 to 184,500), equating to around 1 in 30 people.
 In England, the percentage of people testing positive for COVID19 continued to increase for those aged 2 years to school Year 6 and increased for those in school Year 7 to school Year 11, in the week ending 22 January 2022; the percentage of people testing positive decreased for all other age groups in the most recent week.
 COVID19 infections decreased in all regions in the most recent week except in the South West where the percentage of people testing positive had decreased in the latest two weeks, but the trend was uncertain in the most recent week.
 Omicron variant compatible infections continue to be dominant across all UK countries.
21 January 2022  weekly update
 In England, the percentage of people testing positive for COVID19 decreased in the week ending 15 January 2022; we estimate that 2,984,200 people in England had COVID19 (95% credible interval: 2,886,900 to 3,077,300), equating to around 1 in 20 people.
 In Wales, the percentage of people testing positive for COVID19 decreased in the week ending 15 January 2022; we estimate that 112,100 people in Wales had COVID19 (95% credible interval: 95,200 to 128,700), equating to around 1 in 25 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 increased in the two weeks up to 15 January 2022, but the trend was uncertain in the latest week; we estimate that 104,300 people in Northern Ireland had COVID19 (95% credible interval: 89,300 to 120,600), equating to around 1 in 20 people.
 In Scotland, the percentage of people testing positive for COVID19 decreased in the week ending 15 January 2022; we estimate that 236,600 people in Scotland had COVID19 (95% credible interval: 212,000 to 263,100), equating to around 1 in 20 people.
 Omicron variantcompatible COVID19 infections continue to be dominant across all UK countries.
19 January 2022  interim update
 In England, the percentage of people testing positive for coronavirus (COVID19) decreased in the week ending 15 January 2022; we estimate that 2,984,200 people in England had COVID19 (95% credible interval: 2,886,900 to 3,077,300), equating to around 1 in 20 people.
 In Wales, the percentage of people testing positive for COVID19 decreased in the week ending 15 January 2022; we estimate that 112,100 people in Wales had COVID19 (95% credible interval: 95,200 to 128,700), equating to around 1 in 25 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 increased in the two weeks up to 15 January 2022, but the trend was uncertain in the week ending 15 January 2022; we estimate that 104,300 people in Northern Ireland had COVID19 (95% credible interval: 89,300 to 120,600), equating to around 1 in 20 people.
 In Scotland, the percentage of people testing positive for COVID19 decreased in the week ending 15 January 2022; we estimate that 236,600 people in Scotland had COVID19 (95% credible interval: 212,000 to 263,100), equating to around 1 in 20 people.
 In England, the percentage of people testing positive decreased in all age groups in the most recent week, except those aged 2 years to school Year 6 where the percentage of people testing positive increased in the most recent week.
 COVID19 infections decreased in all regions in the most recent week except in the North East and the South West, where the trend was uncertain.
 Omicron variant compatible infections continue to be dominant across all UK countries.
14 January 2022  weekly update
 In England, the percentage of people testing positive for COVID19 continued to increase in the week ending 6 January 2022; we estimate that 3,735,000 people in England had COVID19 (95% credible interval: 3,624,800 to 3,848,700), equating to around 1 in 15 people.
 In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 6 January 2022; we estimate that 169,100 people in Wales had COVID19 (95% credible interval: 148,700 to 190,600), equating to around 1 in 20 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 continued to increase in the week ending 6 January 2022; we estimate that 99,200 people in Northern Ireland had COVID19 (95% credible interval: 83,800 to 116,800), equating to around 1 in 20 people.
 In Scotland, the percentage of people testing positive for COVID19 continued to increase in the week ending 7 January 2022; we estimate that 297,400 people in Scotland had COVID19 (95% credible interval: 266,600 to 330,000), equating to around 1 in 20 people.
 COVID19 infections compatible with the Omicron variant continued to increase across England, Wales, Northern Ireland and Scotland; Delta variant compatible infections have fallen to very low levels and Omicron is now the dominant variant across all UK countries.
 The percentage testing positive for COVID19 by age is shown below.
12 January 2022  interim update
 In England, the percentage of people testing positive for coronavirus (COVID19) continued to increase in the week ending 6 January 2022; we estimate that 3,735,000 people in England had COVID19 (95% credible interval: 3,624,800 to 3,848,700), equating to around 1 in 15 people.
 In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 6 January; we estimate that 169,100 people in Wales had COVID19 (95% credible interval: 148,700 to 190,600), equating to around 1 in 20 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 continued to increase in the week ending 6 January; we estimate that 99,200 people in Northern Ireland had COVID19 (95% credible interval: 83,800 to 116,800), equating to around 1 in 20 people.
 In Scotland, the percentage of people testing positive for COVID19 continued to increase in the week ending 7 January; we estimate that 297,400 people in Scotland had COVID19 (95% credible interval: 266,600 to 330,000), equating to around 1 in 20 people.
 In England, the percentage of people testing positive has increased among age groups aged 50 years and over, however, infections remain lowest in those aged 70 years and over; in all other age groups, the percentage of people testing positive has increased over the most recent two weeks, but the trend is uncertain in the most recent week.
 COVID19 infections continued to increase across all regions of England except the East of England, and London; the percentage of people testing positive has decreased in London in the most recent week and in the East of England, the trend is uncertain.
 COVID19 infections compatible with the Omicron variant continued to increase across England, Wales, Northern Ireland and Scotland; Delta variant compatible infections have fallen to very low levels and Omicron is now the dominant variant across all UK countries.
7 January 2022  weekly update
 In England, the percentage of people testing positive for COVID19 continued to increase in the week ending 31 December 2021; we estimate that 3,270,800 people in England had COVID19 (95% credible interval: 3,163,500 to 3,377,500), equating to around 1 in 15 people.
 In Wales, the percentage of people testing positive for COVID19 continued to increase in the week ending 31 December 2021; we estimate that 157,900 people in Wales had COVID19 (95% credible interval: 138,900 to 179,600), equating to around 1 in 20 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 continued to increase in the week ending 31 December 2021; we estimate that 72,900 people in Northern Ireland had COVID19 (95% credible interval: 56,800 to 90,100), equating to around 1 in 25 people.
 In Scotland, the percentage of people testing positive for COVID19 continued to increase in the week ending 31 December 2021; we estimate that 238,000 people in Scotland had COVID19 (95% credible interval: 209,300 to 268,000), equating to around 1 in 20 people.
 In the week ending 31 December 2021, COVID19 infections compatible with the Omicron variant continued to increase rapidly across England, Wales, Northern Ireland and Scotland, and Omicron is now the most common variant across all UK countries.
 The percentage testing positive for COVID19 by age is shown below.
5 January 2022  interim update
In the week ending 31 December 2021:
 In England, the percentage of people testing positive for coronavirus (COVID19) continued to increase; we estimate that 3,270,800 people in England had COVID19 (95% credible interval: 3,163,500 to 3,377,500), equating to around 1 in 15 people.
 In Wales, the percentage of people testing positive for COVID19 continued to increase; we estimate that 157,900 people in Wales had COVID19 (95% credible interval: 138,900 to 179,600), equating to around 1 in 20 people.
 In Northern Ireland, the percentage of people testing positive for COVID19 continued to increase; we estimate that 72,900 people in Northern Ireland had COVID19 (95% credible interval: 56,800 to 90,100), equating to around 1 in 25 people.
 In Scotland, the percentage of people testing positive for COVID19 continued to increase; we estimate that 238,000 people in Scotland had COVID19 (95% credible interval: 209,300 to 268,000), equating to around 1 in 20 people.
 In England, COVID19 infections continued to increase across all age groups and were highest among those in school Year 12 to age 24 years.
 In the last few days of 2021, the trend in the percentage testing positive was uncertain for those in London who are secondary school ages and those aged 25 to 49 years, which may mean that infections are no longer increasing among these ages in London, but it is currently too early to suggest if this is a continuing change in trend.
 COVID19 infections continued to increase across all regions of England, with the highest percentage testing positive in London (1 in 10) and the lowest in the South West of England (1 in 30); there were some early signs in the last few days of 2021 that infections may no longer be increasing in London, but it is currently too early to suggest if this is a continuing change in trend.
 COVID19 infections compatible with the Omicron variant continued to increase rapidly across England, Wales, Northern Ireland and Scotland, and Omicron is now the most common variant across all UK countries.