This study has important public health implications and shows the risk of using COVID-19 ‘immunity passport’. Since immunological responses may vary among different ethnic groups, such temporal seroprevalence surveys in the community are required in different populations.
Article: Long QX, Tang XT, Shi QL, et al. Clinical and immunological assessment of asymptomatic SARS-CoV-2 infections. Nature Medicine online publication ahead of print 18th June 2020 doi:10.1038/s41591-020-0965-6Indications and tests-antibody titres in asymptomatic patients