BEIJING (Reuters) - Levels of an antibody found in recovered COVID-19 patients fell sharply in 2-3 months after infection for both symptomatic and asymptomatic patients, according to a Chinese study, raising questions about the length of any immunity against the novel coronavirus.
The research, published in Nature Medicine on June 18, highlights the risks of using COVID-19 'immunity passports' and supports the prolonged use of public health interventions such as social distancing and isolating high-risk groups, researchers said.
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