Members of the World Health Organization team including Peter Ben Embarek, left, walk down a corridor after meetings with the Chinese side in the cordoned wing of their hotel in Wu...

Security personnel watch a checkpoint into the cordoned off area where a World Health Organization team is staying at a hotel in central China's Hubei province. The WHO team is inv...

Peter Daszak of a World Health Organization team leaves in a car after a visit to the Hubei Animal Disease Control and Prevention Center in Wuhan in central China's Hubei province....

Peter Daszak, left, clasps hands with Peter Ben Embarek before they leave the hotel with other members of a World Health Organization team for another day of field visit in Wuhan i...

Members of a World Health Organization team are seen wearing protective gear during a field visit to the Hubei Animal Disease Control and Prevention Center for another day of field...

Members of the World Health Organization team prepare to leave for a fourth day of field visits from their hotel in Wuhan in central China's Hubei province.

The World Health Organization team is briefed outside of the Huanan Seafood Market on the third day of their field visit in Wuhan, China. Scientists initially suspected the coronav...

Ken Maeda, center, of the World Health Organization team prepares to leave for a third day of field visit in Wuhan in central China's Hubei.

Members of the World Health Organization team chat after returning to their hotel in Wuhan in central China's Hubei province. The World Health Organization team investigating the o...

Members of the World Health Organization team of researchers prepare to leave on a field trip in Wuhan in central China's Hubei province. The World Health Organization team of rese...

Workers wave to the team of experts from the World Health Organization who ended their quarantine and prepare to leave the quarantine hotel by bus in Wuhan in central China's Hubei...

Students attend a ceremony to kick off the new semester in Wuhan High School in Wuhan in central China's Hubei province. Chinese students began a full return to regular classes fol...

Workers line up for medical workers to take swabs for the coronavirus test at a large factory in Wuhan in central China's Hubei province. Wuhan have begun testing inhabitants for t...

A man holds a child as they wait for a high speed train leaving for Beijing from Wuhan in central China's Hubei province. Wuhan, the city at the center of the global coronavirus ep...

A farewell ceremony is held for the last group of medical workers who came from outside Wuhan to help the city during the coronavirus outbreak in Wuhan in central China's Hubei pro...

Workers in full protective gear stand in a parking lot of the West Station in Beijing, China, as part of the team coordinating quarantine for incoming passengers from Wuhan. Wuhan,...

A medical worker from China's Jilin Province reacts as she prepares to return home at Wuhan Tianhe International Airport in Wuhan in central China's Hubei Province. Within hours of...

This aerial photo shows the Yellow Crane Tower in Wuhan, China. Chinese authorities ended the lockdown of Wuhan on Wednesday, allowing people to move about and leave the city for t...

Workers labor in a clean room producing masks at a production line for the Wuhan Zonsen Medical Products Co. Ltd in Wuhan in central China's Hubei province.

Workers inspect masks at a production line of the Wuhan Zonsen Medical Products Co. Ltd. in Wuhan in central China's Hubei province. Chinese regulators say ventilators, masks and o...