the Lancet now reports that the coronavirus is contagious even when no symptoms: specifically: “crucial to isolate patients... quarantine contacts as early as possible because asymptomatic infection appears possible”!  Doctors warn China coronavirus carriers may show no symptoms of illness CAT scan revealed signs of pneumonia on 10-year-old Shenzhen boy’s lungs even though he had no outward signs of infection Strict quarantine and contact-tracing regimes ‘crucial’ to containing outbreak  https://www.scmp.com/news/china/society/article/3047636/doctors-warn-china-coronavirus-carriers-may-show-no-symptoms