The Pfizer and Oxford-AstraZeneca vaccines for COVID-19 are highly effective in reducing severe coronavirus infection among people aged 70 years or older, according to a study.
The research, which was posted as pre-printed and not peer-reviewed, estimated the effect of both COVID-19 laboratory-on-laboratory vaccines on the detection of symptomatic disease in 70-year-olds. year or older in England.
The researchers, including those from Public Health England (PHE), compared hospitalization and mortality in COVID-19 confirmed patients over 80 who received the vaccine more than 14 days before they test positive, with unvaccinated cases.
Data show that, in people over 80, one dose of each vaccine is more than 80% effective in preventing hospitalization, about 3 to 4 weeks after the injection, PHE said in the recitation.
Evidence for the Pfizer vaccine suggests it leads to an 83% reduction in deaths from COVID-19, he said.