Two World Health Organization scientists en route to China to investigate the origins of the pandemic are stuck in Singapore after testing positive for Covid-19 antibodies, the UN agency said in a series of tweets Thursday.
The two members are part of the team of scientists traveling to the central Chinese city of Wuhan to conduct field research.
"Two scientists are still in Singapore completing tests for Covid-19. All team members had multiple negative PCR and antibody tests for Covid-19 in their home countries prior to traveling," the WHO said in a tweet Thursday.
The two scientists in Singapore will be retested for antibodies, WHO said.
The other 13 scientists arrived in Wuhan Thursday, WHO said.
When asked about the two scientists in a briefing Thursday, China's Foreign Ministry spokesperson Zhao Lijian did not directly comment but said, “China will strictly follow the relevant epidemic prevention regulations and requirements, and provide corresponding support and facilities for WHO experts who come to China to carry out international cooperation on tracing the origin of the virus."
CNN has reached out to China’s National Health Commission for comment.