As Emily Mullin reports for Elemental, scientists are finding genetic clues that could explain why some people get sicker than others. Researchers worldwide are scanning huge genetic datasets, collecting DNA samples from Covid-19…

As Roxanne Khamsi reports for Elemental, data suggests that testing upon exit of quarantine — ideally around day six or seven — is more effective than upon entry, and testing twice could make an eight-day quarantine as effective as a 14-day one…