The first hints that a vaccine can train people's immune system to fight coronavirus have been reported by a company in the US. Moderna said neutralising antibodies were found in the first eight people who took part in their safety tria...

The trip to Medellin, Colombia, was supposed to be a joyous one for the members Chapecoense, a soccer club from the small city of Chapeco, Brazil, and they were in the middle of a fairy tale season. Now their journey will go down in history ...

No evidence flu has mutated(变异). ...