Retrospective cohort study: Waning COVID-19 vaccine effectiveness for Pfizer and CoronaVac in Malaysia.

Waning COVID-19 Vaccine Effectiveness for BNT162b2 and CoronaVac in Malaysia: An Observational Study – International Journal of Infectious Diseases

Commentary on Twitter

@ICR_NIH RECoVam's
Waning COVID-19 Vaccine Effectiveness for BNT162b2 and CoronaVac in Malaysia in IJID.https://t.co/QwNSRQBKOq

• Against infections, both wane after 3-5 months
• Against ICU admission, CoronaVac wane
• Against death, both retain considerable effectiveness

— Dr Kalai Peariasamy (@drkalai61) March 22, 2022