Switzerland: WHO asks for re-checks of research on possible new virus origin
LONDON, June 3 (Xinhua) -- Samples from a study suggesting that COVID-19 was circulating outside China by October 2019 have been re-tested at the World Health Organization's (WHO) request, a Reuters report quoted two scientists leading the research as saying on Tuesday.
While COVID-19 was first identified in the central Chinese city of Wuhan in December 2019, a study published last year suggested antibodies to either the virus or a variant had been detected elsewhere prior to the first confirmed report of the virus in China.