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COVID-19 vaccines: further evidence of success
https://www.gov.uk/government/news/covi ... of-success
New Public Health England (PHE) analysis shows for the first time that individuals who receive a single dose of the AstraZeneca vaccine have approximately 80% lower risk of death with COVID-19 compared with unvaccinated individuals.
The report also shows protection against death from the Pfizer-BioNTech vaccine rises from approximately 80% after one dose to 97% after 2 doses.
Separate new PHE analysis also confirms the Pfizer-BioNTech vaccine is highly effective in reducing the risk of hospitalisation, especially in older ages.
In one paper published today, PHE looked at the number of new symptomatic polymerase chain reaction (PCR) positive cases between December and April, and those who subsequently died within 28 days of their positive test and compared them according to vaccination status.
This showed that COVID-19 cases vaccinated with a single dose of either the Pfizer-BioNTech or the AstraZeneca vaccines had similar levels of protection against mortality after a single dose, at 44% and 55% respectively, compared with unvaccinated cases.
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.
For the first time, the latest analysis includes protection against mortality from the AstraZeneca vaccine, and additional protection from 2 doses of the Pfizer-BioNTech vaccine.
The data shows that protection against mortality from the Pfizer-BioNTech vaccine is even higher – around 69% – for confirmed cases who had their second dose at least 7 days prior to their positive test.
When combined with the estimated protection against becoming a case, this is equivalent to an estimated 97% protection against mortality in individuals vaccinated with 2 doses of the Pfizer-BioNTech vaccine.
A separate new PHE report also shows further evidence that the vaccine is highly effective in reducing the risk of hospitalisation, especially in older ages.
For the over 80s, it is estimated that 2 doses of the Pfizer-BioNTech vaccine reduces the risk of hospitalisation by 93%.