First report on qualitative detection of anti-COVID-19 antibody IgM and IgG in a short series of 98 subjects, healthcare workers and patients, by use an ELISA assay . Work Paper Public Hlth [Internet]. 2020 Jun. 30 [cited 2025 Jun. 19];8(1). Available from: https://journals.pagepress.org/wpph/article/view/9230