However, Washington Post columnist Josh Rogin has knocked the media participants in a tweet on May 18. "If you are willing to admit the lab leak theory is plausible, you MUST call for a full investigation NOW, including our labs which have crucial information," he tweeted.
More than 168 million COVID-19 cases have been confirmed worldwide, and at least 3.5 million deaths reported.
In March, the World Health Organization released a 120-page report on their joint study with Chinese experts in Wuhan on the origins of COVID-19 from January 14 to February 10.
According to the report, a "very likely" scenario is that the virus was passed to humans through an unknown animal, while the idea that it leaked from a laboratory in Wuhan is "extremely unlikely."