The fifth case in the U.S. of the deadly coronavirus was confirmed in Arizona, the Centers for Disease Control and Prevention said Sunday.Cases of the virus in the U.S. have been reported in Washington state, Chicago, California's Los Angeles County and Orange County, and Arizona.All infected individuals recently traveled to Wuhan, China, where the virus originated. Scientists in Wuhan believe the virus originated in bats, similar to the deadly Ebola virus, which killed thousands in West Africa several years ago.The news comes as Chinese health minister Ma Xiaowei warned that the virus can spread during its incubation period, about two weeks, before infected individuals are experiencing symptoms.“At present, the rate of development of the epidemic is accelerating,” Ma said at a press conference. “I am afraid that it will continue for some time, and the number of cases may increase.”However, Dr. Nancy Messonnier, director of the CDC's National Center for Immunization and Respira...