Table 3.
Number, person-time and hazard ratios for SARS-CoV-2 Omicron infection and severe disease (hospitalisation/death) in dose 2 recipients according to prior infection status.
| SARS-CoV-2 infections from 1 Jan 2022 to 4 Mar 2022 |
SARS-CoV-2 Hospitalisation or deaths from 1 Jan 2022 to 10 Feb 2022 |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean time (weeks) since vaccine receipt (SD) | N | Person Years | Adjusted Hazard Ratio* | 95 % LCI | 95 % UCI | Mean time (weeks) since vaccine receipt (SD) | N | Person Years | Adjusted Hazard Ratio* | 95 % LCI | 95 % UCI | |
| Dose 2 | ||||||||||||
| Infection naiive | 22.0 (4.6) | 119,929 | 147,548 | ref | 21.2 (4.5) | 3,185 | 121,513 | ref | ||||
| Prior infection | 23.3 (6.5) | 251 | 4,816 | 0.062 | 0.055 | 0.071 | 21.5 (6.4) | 10 | 3,458 | 0.122 | 0.066 | 0.227 |
Dose 2 includes all individuals receiving that dose regardless of the time since receipt.
*Adjusted for age, sex, socioeconomic status, co-morbidity (see methods for definitions). For someone with a prior infection to be classified as having a new infection a period of at least 91 days had to separate the infection notifications.