Study registration: *
Publication Yassi A, PLoS ONE, 2021
Dates: 2020-12-15 to 2021-05-13
Funding: Public/non profit (Canadian Institutes of Health Research (CIHR), International Development Research Centre (IDRC), Doctors of BC, and Vancouver Coastal Health.)
Conflict of interest: no COI (The authors have declared that no competing interests exist.)

Methods

Study design:Cohort
Description of participants: Healthcare workers in Vancouver, Canada
Inclusion criteria:
  • Healthcare worker
  • worked in Vancouver Coastal Health between March 15, 2020 and May 13, 2021
  • assessed between December 15, 2020 to May 13, 2021.

Exclusion criteria:
  • Received AstraZeneca vaccine.

Follow-up duration (months): 5.00
Vaccines:
  • 1 or 2 doses of BNT162b2 or mRNA-1273
Variant description :
Variant name: Gamma
Evidence: Indirect evidence (prevalence of variant in the population: >50)
Documents
available

Protocol

NR

Statistical plan

No

Data-sharing stated: Yes
Data accessibility: The data underlying the results presented in this study are available at https://innovation.ghrp.ubc.ca/covid19/data-2021. 05.17.xlsx
General comment The published report was used in data extraction and risk of bias assessment. 93% received BNT162b2 and 7% mRNA-1273 vaccine. Prevalence of variants during study period was estimated from the outbreak.info website.