The following is health guidance from the CDC and FAA for: U.S.-based flight and cabin crewmembers while in China; U.S.- and third country-based flight and cabin crewmembers upon arriving to the United States within 14 days of travel to, from, or within China; China-based flight and cabin crewmembers while in the U.S.; U.S. air carriers housing flight and cabin crews while in China; and U.S. air carriers supervising self-monitoring of flight and cabin crews who have had layovers in China.