“Conclusions: Prior infection in patients with COVID-19 was highly protective against reinfection and symptomatic disease. This protection increased over time…
Discussion: … Protection of prior infection against symptomatic disease was 85%; even when asymptomatic cases were included, protection offered against reinfection was 82%. Few patients were hospitalized following reinfection, and none with COVID-related symptoms required intensive care, suggesting a high level of protection against severe disease. Six months after infection, protection against symptomatic disease exceeded 90%.”
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