One and two dose vaccine effectiveness against SARS-CoV-2 in healthcare workers in BC, Canada

Healthcare workers (HCWs) in British Columbia were amongst the first prioritized for COVID-19 vaccination, with varying intervals between two mRNA COVID-19 vaccine doses applied. We used a test-negative design to compare odds of vaccination among SARS-CoV-2 test-positive and weekly-matched (6:1), randomly-sampled, test-negative HCWs using the Workplace Health Incident Tracking and Evaluation (WHITE) database which includes all HCWs employed by health authorities in BC. Adjusted VE was estimated using conditional logistic regression. We present one and two dose VE overall and by time since last dose. Two dose VE will also be presented by interval between first and second doses.

BC CDC Presenters

10/19/2021 6:35:00 PM