CDC’s plane testing is trying to prevent another pandemic

Five years ago, after a trip to Uhan, Washington state, Covid-19 landed in US soil when a Washington man flew home. However, authorities hadn’t known for days that he was carrying the virus as the US had not tested the plane at the time. Today, the U.S. Centers for Disease Control and Prevention are trying to catch virus intruders before they spread. Dr. Gounder of Celine explains.