WHO emergency committee session comes with their colleagues seeking the origins of the virus on a long-delayed mission to the pandemic ground zero in Wuhan.
Chinese officials blocked the duo from boarding their plane to the central Chinese city of Wuhan after they tested positive for the antibodies in blood-based serology tests during transit in Singapore.
“Relevant epidemic prevention control requirements will be strictly enforced,” says Chinese FM spokesperson.
The EU's medicines agency said a decision would still not come before January 29, even though the drug is already being used in countries including Britain.
World Health Organization director-general Tedros Adhanom Ghebreyesus asked countries that have booked excess vaccine doses to "donate and release them to Covax immediately.
China is determined to control the origin story of the virus, which has killed more than 1.8 million people around the world and laid waste to global economies.
A 10-strong team was due to arrive in China this week after months of painstaking negotiations.
Beijing is determined to control the origin story of the virus, which has killed more than 1.8 million people so far and laid waste to global economies.