It’s a version of the coronavirus that was first identified in Colombia in January....
Most countries remain concerned about the highly contagious Delta variant, which now dominates in all of the 174 countries where it’s been detected....
Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases....
综合
洛杉矶时报-世界与民族
2021-09-09 00:00:00.0