COVID-19 vaccination effectiveness rates by week and sources of bias: a retrospective cohort study
Objective To examine COVID-19 vaccine effectiveness over six 7-day intervals after the first dose and assess underlying bias in observational data.Design and setting Retrospective cohort study using Columbia University Irving Medical Center data linked to state and city immunisation registries.Outco...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
BMJ Publishing Group
2022-08-01
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| Series: | BMJ Open |
| Online Access: | https://bmjopen.bmj.com/content/12/8/e061126.full |