Those measures could be especially valuable now that data shows as many as one-fourth of those infected with the virus could be walking around with no symptoms and transmitting it, according to the head of the US Centers of Disease Control and Prevention.
“One of the (pieces of) information that we have pretty much confirmed now is that a significant number of individuals that are infected actually remain asymptomatic. That may be as many as 25%,” CDC Director Dr. Robert Redfield told NPR. He did not elaborate on how he reached that number. CNN has reached out to the CDC.