claim: coronavirus spread by people with no symptoms 'appears to be reported,'who official says
evidence_1: the spread of coronavirus by people not showing symptoms \"appears to be rare,\" a world health organization [who] official said monday.", "cdc estimates that 35% of coronavirus patients don't have symptoms \"from the data we have, it still seems to be rare that an asymptomatic person actually transmits onward to a secondary individual,\" van kerkhove said on monday.")