COVID-19 origin tracing for political purposes is bound to hit dead end. (Caricature by Zhang Jianyuan)

(ECNS) --The COVID-19 origin tracing has always beena matter of science, yet some U.S. politicians keep stirring up trouble, which will not onlymake it hard to find the origin of the virus, but also undermine theinternational cooperation in thefight against the pandemic. Politicizing COVID-19 origin tracing is bound to hit dead end.