Risk of infection, hospitalisation, and death up to 9 months after a second dose of COVID-19 vaccine: a retrospective, total population cohort study in Sweden

URL

Authors

Peter Nordström, Marcel Ballin, and Anna Nordström

Published Date

February 4, 2022

Publication

The Lancet

Organization

Umeå University (Sweden) - Unit of Geriatric Medicine

Description

This retrospective, total population cohort study found that:

After day 181, vaccine effectiveness (VE) for two doses of BNT162b2 against infection of any severity dropped to 23%.
After day 121, homologous ChAdOx1 nCoV-19 vaccine showed "no detectable effectiveness."

Medium

document

Topics

at risk populations,breakthrough cases,COVID-19,health statistics,risk factors,vaccines