A woman wears a facemask at an ice skating rink during a public holiday in celebration of the Lunar New Year in Hong Kong on January 28, 2020, as a preventative measure following a virus outbreak which began in the Chinese city of Wuhan. China on January 28 urged its citizens to postpone travel abroad as it expanded unprecedented efforts to contain a viral outbreak that has killed 106 people and left other governments racing to pull their nationals from the contagion's epicentre. (Photo by Anthony Wallace/AFP Photo)





In this January 23, 2020, photo, a medical worker rests in a chair next to a patient at a hospital in Wuhan in central China's Hubei Province. As Beijing instates one of the largest quarantines in modern history, locking down over 50 million people in Hubei province, questions are swirling around the provincial government's sluggish initial response. (Photo by AP Photo/China Stringer Network)





A Chinese man wears a protective mask, goggles and coat as he stands in a nearly empty street during the Chinese New Year holiday on January 26, 2020 in Beijing, China. The number of cases of a deadly new coronavirus rose to over 2000 in mainland China Sunday as health officials locked down the city of Wuhan earlier in the week in an effort to contain the spread of the pneumonia-like disease. Medical experts have confirmed the virus can be passed from human to human. In an unprecedented move, Chinese authorities put travel restrictions on the city, which is the epicenter of the virus, and neighboring municipalities affecting tens of millions of people. The number of those who have died from the virus in China climbed to at least 56 on Sunday, and cases have been reported in other countries including the United States, Canada, Australia, France, Thailand, Japan, Taiwan and South Korea. (Photo by Kevin Frayer/Getty Images)





Chinese visitors wear protective masks as they tour the grounds of the Temple of Heaven, which remained open during the Chinese New Year and Spring Festival holiday on January 27, 2020 in Beijing, China. (Photo by Kevin Frayer/Getty Images)





A group of women wear protective masks while exercising on January 27, 2020 in Wuhan, China. As the death toll from the coronavirus reaches 80 in China with over 2700 confirmed cases, the city remains on lockdown for a fourth day. (Photo by Getty Images/China Stringer Network)





A woman wears a mask while carrying a dog in the street on January 22, 2020 in Wuhan, Hubei province, China. A new infectious coronavirus known as “2019-nCoV” was discovered in Wuhan as the number of cases rose to over 400 in mainland China. Health officials stepped up efforts to contain the spread of the pneumonia-like disease which medicals experts confirmed can be passed from human to human. The death toll has reached 17 people as the Wuhan government issued regulations today that residents must wear masks in public places. Cases have been reported in other countries including the United States, Thailand, Japan, Taiwan, and South Korea. (Photo by Getty Images/China Stringer Network)





Doctors look at a CT scan of a patient at a hospital in Wuhan in central China's Hubei Province, Thursday, January 30, 2020. China counted 170 deaths from a new virus Thursday and more countries reported infections, including some spread locally, as foreign evacuees from China's worst-hit region returned home to medical observation and even isolation. (Photo by Chinatopix via AP Photo)





A man wearing a face mask stands near a banner reading “defeat the epidemic” stretched across the entrance to Donggouhe village in northern China's Hebei Province, Wednesday, January 29, 2020. With barricades and wary guardians, villages on the outskirts of Beijing are closing themselves off to outsiders to ward against infection amid the outbreak of a new type of virus. (Photo by AP Photo/Stringer)





People line up to buy face masks from a medical supply company in Nanning in southern China's Guangxi Zhuang Autonomous Region, Wednesday, January 29, 2020. Countries began evacuating their citizens Wednesday from the Chinese city hardest-hit by a new virus that has now infected more people in China than were sickened in the country by SARS. (Photo by Chinatopix via AP Photo)





A girl wears a face mask as she play on a swing near the Yingwuzhou Yangtze River Bridge in Wuhan in central China's Hubei Province, Wednesday, January 29, 2020. Countries began evacuating their citizens Wednesday from the Chinese city hardest-hit by a new virus that has now infected more people in China than were sickened in the country by SARS. (Photo by Arek Rataj/AP Photo)





In this Tuesday, January 28, 2020, file photo, a worker wearing a face mask sprays disinfectant along a path in Wuhan in central China's Hubei Province. Face masks are in short supply in parts of the world as people try to stop the spread of a new virus from China. Health officials recommend strap-on medical masks for people being evaluated for the new virus, their household members and caregivers. (Photo by Arek Rataj/AP Photo/File)





Funeral workers disinfect themselves after handling a virus victim in Wuhan in central China's Hubei Province, Thursday, January 30, 2020. China counted 170 deaths from a new virus Thursday and more countries reported infections, including some spread locally, as foreign evacuees from China's worst-hit region returned home to medical observation and even isolation. (Photo by Chinatopix via AP Photo)





Chinese children wear plastic bottles as makeshift homemade protection and protective masks while waiting to check in to a flight at Beijing Capital Airport on January 30, 2020 in Beijing, China. The number of cases of a deadly new coronavirus rose to over 7000 in mainland China Thursday as the country continued to lock down the city of Wuhan in an effort to contain the spread of the pneumonia-like disease which medicals experts have confirmed can be passed from human to human. In an unprecedented move, Chinese authorities put travel restrictions on the city which is the epicentre of the virus and neighbouring municipalities affecting tens of millions of people. The number of those who have died from the virus in China climbed to over 170 on Thursday, mostly in Hubei province, and cases have been reported in other countries including the United States, Canada, Australia, Japan, South Korea, and France. The World Health Organization has warned all governments to be on alert, and its emergency committee is to meet later on Thursday to decide whether to declare a global health emergency. (Photo by Kevin Frayer/Getty Images)





Doctors watch as donated medical supplies from Beijing are unloaded at a hospital in Wuhan in central China's Hubei Province, Thursday, January 30, 2020. China counted 170 deaths from a new virus Thursday and more countries reported infections, including some spread locally, as foreign evacuees from China's worst-hit region returned home to medical observation and even isolation. (Photo by Chinatopix via AP Photo)





Travelers wearing face masks walk along a concourse at Beijing Capital International Airport in Beijing, Thursday, January 30, 2020. China counted 170 deaths from a new virus Thursday and more countries reported infections, including some spread locally, as foreign evacuees from China's worst-hit region returned home to medical observation and even isolation. (Photo by Mark Schiefelbein/AP Photo)





Medical staff in protective clothes are seen carrying a patient from an apartment suspected of having the virus in Wuhan, in Hubei province on January 30, 2020. The World Health Organization, which initially downplayed the severity of a disease that has now killed 170 nationwide, warned all governments to be “on alert” as it weighed whether to declare a global health emergency. (Photo by Hector Retamal/AFP Photo)





A Chinese volunteer wearing the protective clothing disinfects a street for prevention of the new coronavirus and pneumonia during the Chinese New Year or Spring Festival holiday in Dongxinzhuang Village, Qingdao City, east China's Shandong Province on January 29th, 2020. (Photo by Yu Fangping/Costfoto/Sipa USA)





People wearing face masks walk down a deserted street in Wuhan in central China's Hubei Province, Tuesday, January 28, 2020. China's death toll from a new viral disease that is causing a global concern rose by 25 to at least 106 on Tuesday as the United States and other governments prepared to fly their citizens out of the locked-down city at center of the outbreak. (Photo by Arek Rataj/AP Photo)





Travelers wear face masks as a screen shows a video about the proper way to wear a mask at the Beijing Railway Station in Beijing, Friday, January 31, 2020. The U.S. advised against all travel to China on Friday after the World Health Organization declared the outbreak of a new virus that has spread to more than a dozen countries a global emergency. (Photo by Mark Schiefelbein/AP Photo)





Production workers of Jiangsu Shuoshi Biotechnology Co. Ltd. carry out work on a new coronavirus (2019) nucleic acid detection kit (fluorescence PCR) in Taizhou City, Jiangsu Province, China, 29 January 2020. The death toll from the outbreak of coronavirus in China has reached 132 and infected more than 6000 others, according to media reports. (Photo by EPA/EFE/China Stringer Network)





A registration book for residents who have recently returned from other provinces is displayed at the entrance to a neighborhood in Beijing, Friday, January 31, 2020. As China institutes the largest quarantine in human history, locking down more than 50 million people in the center of the country, those who have recently been to Wuhan are being tracked, monitored, turned away from hotels and shoved into isolation at their homes and in makeshift quarantine facilities. (Photo by Dake Kang/AP Photo)





This photo taken on January 30, 2020 shows officials in protective suits checking on an elderly man wearing a facemask who collapsed and died on a street near a hospital in Wuhan. AFP journalists saw the body on January 30, not long before an emergency vehicle arrived carrying police and medical staff in full-body protective suits. The World Health Organization declared a global emergency over the new coronavirus, as China reported on January 31 the death toll had climbed to 213 with nearly 10,000 infections. (Photo by Hector Retamal/AFP Photo)