The US Centers for Disease Control and Prevention (CDC) estimates that around 35% of novel coronavirus COVID-19 infections are asymptomatic.<br />In other words, people infected with the virus show no symptoms at all.<br />But according to Business Insider, new research suggests the 35% figure may actually be a conservative guess.<br />Studies of cruise ship passengers in Argentina and patients in Wuhan, China showed roughly half of those who tested positive showed symptoms.<br />Not only that, but the Wuhan study also showed those asymptomatic cases were only contagious for approximately half as long as those who had symptoms.<br />Researchers from the University of California - San Francisco say asymptomatic spread is the "Achilles heel" of coronavirus mitigation strategies.<br />In other words, without testing asymptomatic patients, the US might continue to struggle to contain its COVIC-19 outbreak.
