FILE - In this Monday, March 2, 2020 file photo, a health alert for people traveling to China is shown at a TSA security checkpoint at the Denver International Airport in Denver. A steep drop in business travel could be a gut punch to a tourism industry already reeling from the coronavirus outbreak, as big companies like Amazon try to keep employees healthy by banning trips. (AP Photo/Charles Rex Arbogast, File)

March 4, 2020