CDC: Covid-19 Vaccine Effectiveness Fell From 91% To 66%
CDC: Covid-19 Vaccine Effectiveness Fell From 91% To 66% With Delta Variant
https://www.forbes.com/sites/brucelee/2021/08/24/cdc-covid-19-vaccine-effectiveness-fell-from-91-to-66-with-delta-variant/?sh=32a277f328f7