Photo taken on March 30, 2021 shows an exterior view of the headquarters of the World Health Organization (WHO) in Geneva, Switzerland. The WHO released a report on Tuesday following a joint research with China on the global tracing of COVID-19 origins. (Xinhua/Chen Junxia)

Photo taken on March 30, 2021 shows the entrance of the headquarters of the World Health Organization (WHO) in Geneva, Switzerland. The WHO released a report on Tuesday following a joint research with China on the global tracing of COVID-19 origins. (Xinhua/Chen Junxia)

Photo taken on March 30, 2021 shows an exterior view of the headquarters of the World Health Organization (WHO) in Geneva, Switzerland. The WHO released a report on Tuesday following a joint research with China on the global tracing of COVID-19 origins. (Xinhua/Chen Junxia)