par updateov:
https://www.aktuality.sk/clanok/823440/who-schvalila-protokol-o-testovani-bylinnych-liekov-na-koronavirus/

Available evidence from contact tracing reported by countries suggests that asymptomatically infected individuals are much less likely to transmit the virus than those who develop symptoms.
http://www.emro.who.int/health-topics/corona-virus/transmission-of-covid-19-by-asymptomatic-cases.html