"By the fourth week after receiving the initial dose, the Pfizer and Oxford/AstraZeneca vaccines had reduced the risk of hospital admissions from Covid-19 by up

"By the fourth week after receiving the initial dose, the Pfizer and Oxford/AstraZeneca vaccines had reduced the risk of hospital admissions from Covid-19 by up to 85% and 94% respectively, according to a study by Scottish universities and Public Health Scotland." https://www.theguardian.com/world/2021/feb/22/one-vaccine-protection-severe-covid-evidence https://www.theguardian.com/world/2021/feb/22/one-vaccine-pr...