Data
195,235 items of data are available, covering 195,186 participants.
Some values have special meanings defined by Data-Coding 
1273.
Defined-instances run from 0 to 1, labelled using Instancing 
154.
| 
| Maximum | 2021-06-24 |  | Decile 9 | 2021-03-14 |  | Decile 8 | 2021-02-28 |  | Decile 7 | 2021-02-17 |  | Decile 6 | 2021-02-12 |  | Median | 2021-02-07 |  | Decile 4 | 2021-02-03 |  | Decile 3 | 2021-01-30 |  | Decile 2 | 2021-01-23 |  | Decile 1 | 2021-01-16 |  | Minimum | 2020-02-10 |  |   | 
There are 311 distinct values.Mean = 2021-02-09544 items below graph minimum of 2020-11-2033 items above graph maximum of 2021-05-10112 items have value 1900-01-01 (Date is unknown)15 items have value 1999-01-01 (Date is invalid) | 
2 Instances
Instance 0 : First COVID-19 antibody test taken, Feb 2021 to July 2021
195,034 participants, 195,034 items
| 
| Maximum | 2021-06-24 |  | Decile 9 | 2021-03-14 |  | Decile 8 | 2021-02-27 |  | Decile 7 | 2021-02-17 |  | Decile 6 | 2021-02-12 |  | Median | 2021-02-07 |  | Decile 4 | 2021-02-03 |  | Decile 3 | 2021-01-30 |  | Decile 2 | 2021-01-23 |  | Decile 1 | 2021-01-16 |  | Minimum | 2020-02-10 |  |   | 
There are 309 distinct values.Mean = 2021-02-09544 items below graph minimum of 2020-11-2029 items above graph maximum of 2021-05-10112 items have value 1900-01-01 (Date is unknown)15 items have value 1999-01-01 (Date is invalid) | 
Instance 1 : Repeat COVID-19 antibody test taken, March 2021 to July 2021
201 participants, 201 items
| 
| Maximum | 2021-06-12 |  | Decile 9 | 2021-03-25 |  | Decile 8 | 2021-03-18 |  | Decile 7 | 2021-03-15 |  | Decile 6 | 2021-03-13 |  | Median | 2021-03-11 |  | Decile 4 | 2021-03-10 |  | Decile 3 | 2021-03-07 |  | Decile 2 | 2021-02-16 |  | Decile 1 | 2021-01-30 |  | Minimum | 2020-12-31 |  |   | 
There are 66 distinct values.Mean = 2021-03-073 items above graph maximum of 2021-05-18 | 
Notes
When participants submitted their COVID-19 antibody test result, they were asked to "Please enter the date of your first vaccination" if they had responded with 'yes' to having received their first jab.
Coding 1273 defines 2 special values:
- 1900-01-01 represents "Date is unknown"
- 1999-01-01 represents "Date is invalid"