影樱花由youre　putting　out　a　whole　lot　of　virus.成长BothPatient　1　and　his　Shanghai　colleague　transmitted　the　virus　before　developingsymptoms.　非虚The　high　levels　of　virus　shedding　fromthe　nose　and　throat　happened　very　early　in　infection　—　by　the　time　of　testing.影樱花由Subscribe　or　Donate　Now　Scientists　identified　these　nine　people　some　time　after　they　had　been　exposed　to　the　coronavirus.　成长Infectious　viruses　were　isolated　fromabout　17　percent　of　nose　and　throat　swabs　and　more　than　83　percent　of　phlegmsamples　during　that　first　week.　非虚All　nine　patients　are　employees　of