[HTML][HTML] Effectiveness of Covid-19 vaccines against the B. 1.617. 2 (Delta) variant

JL Bernal, N Andrews, C Gower… - … England Journal of …, 2021 - Mass Medical Soc
Abstract Background The B. 1.617. 2 (delta) variant of the severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (Covid-19),
has contributed to a surge in cases in India and has now been detected across the globe,
including a notable increase in cases in the United Kingdom. The effectiveness of the
BNT162b2 and ChAdOx1 nCoV-19 vaccines against this variant has been unclear. Methods
We used a test-negative case–control design to estimate the effectiveness of vaccination …