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Study: Previous COVID-19 infection does not completely protect against reinfection in young people A past COVID-19 infection does not completely protect against reinfection in young people, according to an observational study of more than 3,000 healthy members of the US Marines Corps most of whom were aged 18-20 years, published in The Lancet Respiratory Medicine journal. The authors say that despite previous infection and the presence of antibodies, vaccination is still necessary to boost immune responses, prevent reinfection, reduce transmission, and that young people should take up the vaccine wherever possible. In the study, between May and November 2020, around 10% (19 out of 189) of participants who were previously infected with SARS-CoV-2 (seropositive) became reinfected, compared with new infections in 50% (1,079 out of 2,247) of participants who had not previously been infected (seronegative).

United statesUnited kingdomUniversitario fundaciStuart sealfonEmily hendersonNavy medical research centreIcahn school of medicine at mount sinaiLancet respiratory medicineIcahn schoolMount sinaiDawn weirHospital universitario fundaciArs cov 2ஒன்றுபட்டது மாநிலங்களில்ஒன்றுபட்டது கிஂக்டம்எமிலி ஹென்டர்சன்