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Understanding the protection conferred by previous infection against repeat infection, illness, and severe disease is key to projecting the future epidemiology of COVID-19 and to guiding vaccine policy decisions. In The Lancet, The COVID-19 Forecasting Team1 report data from a systematic review and meta-analysis of 65 studies from 19 different countries estimating the reduction in COVID-19 risk among individuals with previous SARS-CoV-2 infection, compared with those without a previous infection.

For at least 10 months after a COVID-19 infection, your immune system can provide good protection against illness the next time around, a new study found.

COVID-19 hospitalizations in Illinois are climbing once again after dipping to some of the lowest levels in nearly a year, according to Illinois Department of Public Health records.

For at least 10 months after a Covid-19 infection, your immune system can provide good protection against symptomatic illness the next time around, a new study found, and the risk

All estimates of protection waned within months against reinfection but remained high and sustained for hospital admission or severe disease. Individuals with hybrid immunity had the highest magnitude and durability of protection, and as a result might be able to extend the period before booster vaccinations are needed compared to individuals who have never been infected.