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Data Provider: Welsh Government Number of antibody tests processed in NHS Wales laboratories
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Week Commencing 1
[Collapse]Number of testsPHW Antibody and DHCW lateral flow (antibody) testsClick here to sortNumber of testsPHW Antibody and DHCW lateral flow (antibody) tests
Click here to sortPositive resultsPHW Antibody and DHCW lateral flow (antibody) testsClick here to sortNegative resultsPHW Antibody and DHCW lateral flow (antibody) testsClick here to sortEquivocal resultsPHW Antibody and DHCW lateral flow (antibody) tests
[Collapse]All weeks(r) The data item has been revised since previously published in StatsWales.20,969(r) The data item has been revised since previously published in StatsWales.80,847284(r) The data item has been revised since previously published in StatsWales.102,100
All weeks18 May 2020221067135
25 May 2020924073502
01 June 2020742833360
08 June 202017560510790
15 June 20203103,145113,466
22 June 20201,37711,051512,433
29 June 20201,0398,043699,151
06 July 20208248,13348,961
13 July 20208879,485510,377
20 July 20201,0929,7641110,867
27 July 20207665,35436,123
03 August 20206244,56735,194
10 August 20204353,216.The data item is not applicable3,651
17 August 20203482,64712,996
24 August 20202701,938.The data item is not applicable2,208
31 August 20202521,651.The data item is not applicable1,903
07 September 20202312,142.The data item is not applicable2,373
14 September 20202192,173.The data item is not applicable2,392
21 September 20201961,336.The data item is not applicable1,532
28 September 20201441,165.The data item is not applicable1,309
05 October 202073900.The data item is not applicable973
12 October 202042347.The data item is not applicable389
19 October 202056465.The data item is not applicable521
26 October 202027222.The data item is not applicable249
02 November 202027793109
09 November 20203385.The data item is not applicable118
16 November 20203057289
23 November 20202042.The data item is not applicable62
30 November 20202828.The data item is not applicable56
07 December 20203238.The data item is not applicable70
14 December 20203845.The data item is not applicable83
21 December 20202029.The data item is not applicable49
28 December 20202415.The data item is not applicable39
04 January 20212543.The data item is not applicable68
11 January 20212733.The data item is not applicable60
18 January 20212933163
25 January 20213936.The data item is not applicable75
01 February 202180441125
08 February 2021139393181
15 February 2021199553257
22 February 2021213494266
01 March 2021274348316
08 March 2021366805451
15 March 2021152261179
22 March 2021376398423
29 March 2021379398426
05 April 2021198284230
12 April 2021295387340
19 April 2021286302318
26 April 202115139.The data item is not applicable190
03 May 2021226306262
10 May 202184292115
17 May 202115321.The data item is not applicable174
24 May 2021390216417
31 May 2021377223402
07 June 2021409252436
14 June 20215114166
21 June 2021394194417
28 June 2021263224289
05 July 202112815.The data item is not applicable143
12 July 2021332224358
19 July 2021275153293
26 July 2021187123202
02 August 2021787.The data item is not applicable85
09 August 2021333146353
16 August 202110683117
23 August 2021195132210
30 August 2021163131177
06 September 202110615.The data item is not applicable121
13 September 2021767184
20 September 20218710299
27 September 202198114113
04 October 20217122699
11 October 2021223143240
18 October 2021232195256
25 October 202199262127
01 November 2021163328203
08 November 2021257341292
15 November 2021279253307
22 November 202114912.The data item is not applicable161
29 November 2021658174
06 December 20211371.The data item is not applicable138
13 December 20218811.The data item is not applicable99
20 December 20211503.The data item is not applicable153
27 December 2021166.The data item is not applicable22
03 January 202213323138
10 January 20221271.The data item is not applicable128
17 January 20221022.The data item is not applicable104
24 January 20221852.The data item is not applicable187
31 January 20221114.The data item is not applicable115
07 February 20221191.The data item is not applicable120
14 February 2022114.The data item is not applicable.The data item is not applicable114
21 February 20221272.The data item is not applicable129
28 February 20221031.The data item is not applicable104
07 March 2022108.The data item is not applicable.The data item is not applicable108
14 March 202265.The data item is not applicable.The data item is not applicable65
21 March 2022781.The data item is not applicable79
28 March 2022413.The data item is not applicable44
04 April 2022612.The data item is not applicable63


General description

Number of weekly antibody tests and results authorised by NHS Wales laboratories.

Data collection and calculation

The data is management information which has been collected to support testing operations. We’re publishing these data to provide a timely summary of testing activity but they have not undergone the same level of quality assurance as official statistics, with the data subject to future revisions.

Frequency of publication


Data reference periods

18 May 2020 onwards

Revisions information

The data are management information, not official statistics, and are revised regularly. The Public Health Wales surveillance dashboard is updated daily with the most recent data, including revisions to the data published here.

From 13 July 2020, Public Health Wales have combined tests and results processed in NHS Wales laboratories and non-NHS Wales laboratories, which were previously reported separately. Further details are included in the release outlining which tables and charts show tests authorised for both laboratories or separately. The data has been revised historically except for the annex table showing the number of tests authorised in the last 24 hours to 1pm, which reflects what was published on the Public Health Wales surveillance dashboard on a given day.

On the evening of Friday 11 December 2020, there was planned maintenance of the Welsh Laboratory Information Management System (WLIMS) to allow essential service upgrades to take place. On Monday 14 December 2020, figures were updated for the period of 1pm on Friday 11 to 9am on Sunday 13, a total of 44 hours, however the data flows for tests from the WLIMS had been affected during this period. After this downtime, there was a period of data reconciliation and validation which are reflected in the figures in this publication.


Number of antibody tests processed in NHS Wales laboratories

Last update

13 April 2022 13 April 2022

Next update


Publishing organisation

Welsh Government

Source 1

Public Health Wales

Source 2

Digital Health and Care Wales (DHCW)

Contact email



Lowest level of geographical disaggregation


Geographical coverage


Languages covered

English and Welsh

Data licensing

You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see

Statistical quality

The total number of tests completed may differ to other tables due to different reporting times. For the purposes of this analysis, a week is classed as 00:00 Monday to 23:59 Sunday.

The number of tests and results reflect a snapshot in time and will be greatly influenced by the sampling strategy at that moment in time. More information is available in the Antibody testing: coronavirus (COVID-19) pages of our website.

If an antibody test is equivocal, it means that the result is inconclusive.

Prior to December 2020 antibody tests were conducted by local health boards in Wales for surveillance of key groups working in health, social care and education. The testing of domiciliary care workers continued until April 2021. Antibody tests taken for diagnostic reasons in hospital settings are also included in the data presented in this release.
We won’t be revising data past 52 weeks.


COVID-19, Coronavirus, Antibody, Testing