Around 10% of persons resuming employment in Wuhan , tested first half of April test positive by serology. Small sample, data from one hospital, but to my knowledge the first indication of population level antibody prevalence. https://t.co/tzBN8l2TDj @mvankerkhove @ReinaSikkema

— Marion Koopmans, publications: https://pure.eur.nl (@MarionKoopmans) April 27, 2020