3. Shanghai Ballet dancers wearing
masks practice in a dance studio in
Shanghai, China, as the country is
hit by an outbreak of the novel
coronavirus, February 20, 2020.
REUTERS/Aly Song
4. A man wearing a mask to prevent contracting the coronavirus rides on a subway in Seoul, South Korea, February 20, 2020. REUTERS/Kim Hong-Ji
10. People wear face masks and plastic raincoats as protection from coronavirus at Shanghai railway station, in Shanghai, China February 17, 2020. REUTERS/Aly Song
11. A man wears a face mask on the Trocadero esplanade in front of the Eiffel Tower in Paris, France, January 25, 2020. REUTERS/Benoit Tessier
12. A couple wearing masks to protect against an outbreak of a coronavirus as they ride on a carnival on Valentine s Day in Hong Kong, China February 14, 2020. REUTERS/Tyrone Siu
13. Women clean a classroom to protect against the recent coronavirus outbreak, in preparation
for students' return to school in Hanoi, Vietnam February 15, 2020. REUTERS/Kham
14. A couple wears masks to protect against an outbreak of a coronavirus as they take a photo on Valentine s Day in Hong Kong, China February 14, 2020. REUTERS/Tyrone Siu
15. People wearing face masks dance at a park in Beijing, China February 21, 2020. REUTERS/Stringer
16. A child rides a scooter past a police officer wearing protective gear outside the Hong Mei House in Hong Kong on February 11. Anthony Wallace/AFP/Getty Images
18. A worker installs plastic film to separate the front seats from the back, inside a vehicle for a car-hailing service in Taiyuan, Shanxi province, China February 14, 2020. cnsphoto via REUTERS
19. Iraqi medical staff check passengers' temperature, amid the new coronavirus outbreak,
upon their arrival at Najaf airport, Iraq February 20, 2020. REUTERS/Alaa al-Marjani.
20. Two residents walk in an empty park in Wuhan on January 27. The city remained on lockdown for a fourth day.Stringer/Getty Images
25. A sales clerk wears a mask as she waits for customers at a hat shop in Beijing on Tuesday, February 18. Kevin Frayer/Getty Images
26. Children wear plastic bottles as makeshift masks while waiting to check in to a
flight at the Beijing Capital Airport on January 30.Kevin Frayer/Getty Images
27. People wearing face masks play table tennis at a park in Beijing, China February 21, 2020. REUTERS/Stringer
38. A man wears a mask outside a KFC in downtown Shanghai, China February 21, 2020. REUTERS/Aly Song
39. Sanitation workers disinfect a residential compound, as the country is hit by an outbreak of the
novel coronavirus, in Bozhou, Anhui province, China February 18, 2020. China Daily via REUTERS
40. An employee deliver buns to a customer through a ramp from the restaurant counter
at a store in Beijing, China February 12, 2020. REUTERS/Carlos Garcia Rawlins
43. Medical officers spray Indonesian nationals with
antiseptic after they arrived from Wuhan, China,
before transferring them to be quarantined, at Hang
Nadim Airport in Batam, Indonesia, February 2,
2020. (Photo by Antara Foto via Reuters)
44. Flight attendants wearing face masks make their way through Don Mueang Airport in Bangkok, Thailand, on February 7.Anusak Laowilas/NurPhoto via Getty Images
45. An employee wearing a facial mask walks through a device that sprays disinfectant at the entrance of a company, after an outbreak of the new coronavirus in the country, in Chongqing, China (REUTERS)
46. A worker with protective gears sprays disinfectant inside a shop as a precaution against a new coronavirus at the Namdaemun market in Seoul, South Korea (AP / Ahn Young-joon)
47. A worker has his temperature checked on a shuttered commercial street in Beijing on February 12.Kevin Frayer/Getty Images