Two doses of Pfizer-BioNTech or AstraZeneca-Oxford's COVID-19 vaccines are nearly as effective against the highly transmissible delta coronavirus variant as they are against the previously dominant alpha variant, a new study shows.
Two doses of Pfizer-BioNTech or AstraZeneca-Oxford's COVID-19 vaccines are nearly as effective against the highly transmissible delta coronavirus variant as they are against the previously dominant alpha variant, a new study shows.
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