The Dotonbori area of Osaka, Japan. Researchers say some East Asian populations may have traces of a type of coronavirus in their genetic make-up, but it is not thought to provide natural protection to today's novel coronavirus. Philip Fong / AFP
The Dotonbori area of Osaka, Japan. Researchers say some East Asian populations may have traces of a type of coronavirus in their genetic make-up, but it is not thought to provide natural protection tShow more

Evidence of exposure to coronaviruses in East Asia 25,000 years ago is found