People without symptoms spread virus in more than half of cases, CDC model finds

People with no symptoms transmit more than half of all cases of the novel coronavirus, according to a model developed by researchers at the Centers for Disease Control and Prevention.

Their findings reinforce the importance of following the agency’s guidelines: Regardless of whether you feel ill, wear a mask, wash your hands, stay socially distant and get a coronavirus test. That advice has been a constant refrain in a pandemic responsible for more than 350,000 deaths in the United States.