One dose of the AstraZeneca Covid-19 vaccines reduces the risk of death from the disease by 80%, a study done by the UK govt's health agency shows. Public Health England has said in a statement that 'people who had a single dose of AstraZeneca vaccine were 55% protected against death, with a figure of 44% protection for a single dose of Pfizer, compared to unvaccinated people.'
The statement further added that 'combined with the protection vaccines offer against becoming a case in the first place, this is equivalent to approximately 80% protection against mortality in individuals vaccinated with a single dose of either vaccine."
It also said protection against death from the Pfizer-BioNTech vaccine rises from approximately 80% after one dose to 97% after two doses in its new analysis.
PHE has said that their 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.