. >> reporter: victor gou is a long-time china foreign affairs commentator. >> this virus outbreak of wuhan other parts of the world. including most logically in the united states. centering on fort dietrich. >> reporter: few know about the now closed center of the bioweapons program near washington, d.c. but in china, fort dietrich is famous, even a rap song demands it be investigated. at china's institute of international studies claims there is proof covid started outside china. >> you cannot say it is possible -- impossible from the united states. >> reporter: and the w.h.o. has been barred from returning to wuhan after their first visit in january, furthering complaints beyond china's borders over lack of access and transparency. >>> do you think the world health organization should be allowed to go back in? >> if they don't provide evidence about wildlife, then we will the third, even the fourth. >> reporter: in short, no. and the propaganda is working. the w.h.o. is bullying the chinese people, this person told cbs news in wuhan. the u.s. is trying to shift blame to china, says

. >> reporter: victor gou is a long-time china foreign affairs commentator. >> this virus outbreak ofncluding most logically in the united states. centering on fort dietrich. >> reporter: few know about the now closed center of the bioweapons program near washington, d.c. but in china, fort dietrich is famous, even a rap song demands it be investigated. at china's institute of international studies claims there is proof covid started outside china. >> you cannot say it is