‘Levels of an antibody found in recovered COVID-19 patients fell sharply in two to three 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 Jun 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.’
Read here (Channel News Asia, June 22, 2020)
