The WHO team visited the P4 lab inside the Wuhan Institute of Virology, the state-owned Global Times reported.
The team of WHO experts arrived in Wuhan on January 14 to investigate the origins of COVID-19, as the world's first cluster of infected patients were detected in the city in December 2019. The WHO team only began field work last week, after completing two weeks of quarantine upon arrival.
The team has visited local hospitals where the first wave of COVID-19 patients were treated and a local market that was believed to be associated with the first cluster of infected patients.
The Wuhan Institute of Virology became a focal point of the WHO team's mission in China, after a number of conspiracy theories suggested that the new coronavirus, known as SARS-CoV-2, may have leaked from the secretive lab where thousands of coronavirus samples were collected and stored.
Shi Zhengli, a leading virologist at the Wuhan lab, is widely known as the "bat woman" for her extensive research into the coronavirus that caused the Severe Acute Respiratory Syndrome (SARS) in China in 2003. Shi spent more than five years to collect coronavirus samples from bat caves in southwestern China. Her research reached the conclusion that the coronavirus that caused SARS came from the horseshoe bats found in those caves.
One of the popular conspiracy theories suggested that SARS-CoV-2 may have been accidentally leaked from Shi's lab. But Shi made several public statements denying such allegations.
In a research report released last week, Dr. Steven Quay, who used to be on the faculty of Stanford University School of Medicine, suggested that there was a 99.8 percent possibility that SARS-CoV-2 came from a laboratory and only a 0.2 percent likelihood that it came from nature.
"Like many others, I am concerned about what appear to be significant conflicts of interest between members of the WHO team and scientists and doctors in China and how much this will impede an unbiased examination of the origin of SARS-CoV-2," said Dr. Quay.
Chinese authorities have consistently denied such allegations of a possible lab leak and began to spread alternative theories that SARS-CoV-2 may have originated from other countries.
Chinese Foreign Ministry Spokesman Wang Wenbin suggested on Tuesday that the US government should also invite WHO experts to investigate the possibility of SARS-CoV-2 originating from the United States.
