Based on data from 1.14 million vaccinations which have been administered, scientists from the University of Edinburgh have shown that both the BioNtech/Pfizer and Oxford vaccines are highly effective and that by the fourth week after receiving the initial dose shown to reduce the risk of hospitalisation from COVID-19 by up to 85% and 94%, respectively.
They report that by the fourth week after receiving the initial vaccination, those aged 80 years and over were shown to have an 81% reduction in hospitalisation risk, a combined result for data from those vaccinated with either the Oxford or BionTech/Pfizer vaccines.