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Excelsio Media by Nelson Alarcón - alarcónnelson

Two Pfizer, AstraZeneca doses work against Delta, study says

Two Pfizer, AstraZeneca doses work against Delta, study says
Two doses of Pfizer or AstraZeneca's COVID-19 vaccine are nearly as effective against the highly transmissible Delta coronavirus variant as they are against the previously dominant Alpha variant, a study shows.


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