Volume 28, Number 8—August 2022
Estimating COVID-19 Vaccine Effectiveness for Skilled Nursing Facility Healthcare Personnel, California, USA
||Vaccine effectiveness (95% CI), %|
|No removal of previous positive results (4,238 case‒control participants; 2,119 matched pairs)||Partial||465||629||37.5 (27.7–46.0)|
|Removal of previous positive results within 90 d (3,742 case‒control participants; 1,871 matched pairs)||Partial||430||567||35.6 (24.8–44.8)|
|Removal of previous positive results within 180 d (3,424 case‒control participants; 1,712 matched pairs)||Partial||394||524||36.3 (25.1–45.8)|
*Unadjusted analysis results are presented. Adjustment for sex, age, and Healthy Places Index scores did not substantially alter these estimates. †Partial vaccination: >1 dose before specimen collection date but final dose <14 d before specimen collection date; full vaccination: final dose >14 d before specimen collection date.