Protection against COVID-19 offered by two doses of the Pfizer/BioNTech and the Oxford/AstraZeneca vaccines begins to fade within six months, underscoring the need for booster shots, according to researchers in Britain.
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Reuters: UK researchers say COVID vaccine protection wanes within six months
A patient sits on the bed at the Covid-19 specialized ward at the Honorio Delgado Hospital in Arequipa, on June 18, 2021, following the sprouting cases of the deathly Delta strain.
