Posted in Uncategorized Two doses of Pfizer, AstraZeneca shots effective against … November 20, 2022 Two doses of Pfizer (PFE.N) or AstraZeneca’s (AZN.L) COVID-19 vaccine are nearly as effective against the highly transmissible Delta coronavirus variant as they are against the previously dominant … https://www.reuters.com/business/healthcare-pharmaceuticals/two-doses-pfizer-astrazeneca-shots-effective-against-delta-variant-study-finds-2021-07-21/