Health and Human Services Secretary Alex Azar said worry about the virus should not affect Americans' day-to-day lives. So far, there are five confirmed cases of the virus in the U.S. and no sign they have spread the illness to those around them.
WATCH: HHS SECRETARY ALEX AZAR GIVES LATEST ON CORONAVIRUS IN US
One of those cases is in the Chicago area, a woman in her 60s who had traveled to Wuhan in late December and returned to the U.S. on Jan. 13.
As a precaution, the U.S. is beefing up its checks on returning international travelers beyond the five airports initially announced, to encompass 20 entry points.
Chicago's O'Hare Airport began screening arriving passengers from China Wednesday amid growing concerns over the coronavirus spreading in China.
ABC OTV stations contributed to this report.