About half of people who have the coronavirus show no symptoms, according to data from Iceland, the Italian town of Vo, and the Diamond Princess cruise ship.
The data from those places is of particular interest to researchers because in those places even people without symptoms were tested – which is not the case in the U.S.
and most countries, where desperately needed tests are reserved mostly for people who show symptoms. MORE NEWS: Florida coronavirus cases now over 12,000; death toll jumps to 218, health officials say Experts say the discovery has critical implications and shows that even more widespread testing may be needed to identify all carriers.