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Protection From Pfizer, AstraZeneca Jabs Wanes Within 6 Months: UK Study

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London:  Protection against COVID-19 offered by two doses of the Pfizer/BioNTech and the Oxford/AstraZeneca coronavirus vaccines begins to fade within six months, underscoring the need for booster shots, according to researchers in Britain. After five to six months, the effectiveness of the Pfizer jab at…

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Delta Gives Vaccinated People Same Virus Amount As Unvaccinated: Study

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Vaccines against Covid-19 are less effective against the delta variant, a large U.K. study showed in results that may fuel a push for booster shots for fully vaccinated people. Pfizer Inc. and BioNTech SE’s messenger RNA vaccine lost effectiveness in the first 90 days after full vaccination, though that shot and…

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