A new study published on Wednesday showed how two doses of Pfizer or AstraZeneca’s COVID-19 vaccine are nearly as effective against the Delta variant as they are the previously dominant Alpha variant. Despite stating that one shot of the vaccines is not enough for high protection, two doses are confirmed to provide significant safety against the virus.
The study found that two Pfizer doses were 88% effective at preventing symptomatic disease from the Delta variant, compared to 93.7% effectiveness against the Alpha variant. AstraZeneca registered at 67% effectiveness against the Delta whilst being 74.5% effective against the Alpha. One Pfizer shot was registered as 36% effective, whilst AstraZeneca reached a 30% effectiveness.
The authors of the study reported that their findings of ‘reduced effectiveness after the first dose support efforts to maximise vaccine uptake with two doses among vulnerable groups in the context of circulation of the Delta variant.’
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Photo Source: The Guardian