Covid: Single shot of AstraZeneca vaccine cuts death risk by 80%, shows data

London - The study also found that protection against death from the Pfizer-BioNTech vaccine rose to 97 per cent (from 80 per cent) after two doses.

Data from the rollout of Oxford-AstraZeneca's Covid-19 vaccine shows one dose of the shot results in 80 per cent less risk of death from the disease, Public Health England (PHE) said on Monday.

It also said protection against death from the Pfizer-BioNTech vaccine rises from approximately 80 per cent after one dose to 97 per cent after two doses in its new analysis.

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PHE said the study was the first on protection against mortality from the AstraZeneca vaccine based on data from a real world setting.

The Serum Institute of India is manufacturing Covishield, a licensed version of Oxford-AstraZeneca vaccine.

The study looked at new symptomatic cases of Covid-19 between December and April and people who died within 28 days of their positive test by vaccination status.

People who had a single dose of AstraZeneca vaccine were 55 per cent protected against death, with a figure of 44 per cent protection for a single dose of Pfizer, compared to unvaccinated people.