Covid-19 vaccine may give people immunity from the virus for 90 days. A paper published by government scientific advisers said that the duration of the jab’s effectiveness is ‘not yet fully understood’.
Their estimate is based on the fact that other coronaviruses tend to reinfect after one or two years, the Mirror reports. Reinfections with seasonal coronaviruses occur frequently at 12 months and sometimes as early as six months - but not within three months, the report said.The New and Emerging Virus Threats Advisory Group wrote: "Based on the variability in the data and differential responses in the population we conservatively estimate that a protective immune response after SARS-CoV-2 infection or vaccination may last for 90 days."They.