Novel Coronavirus Outbreak

A girl wears a mask as she walks past a scanning machine monitoring people's temperature following the new coronavirus outbreak from China, at Bandaranaike international airport in Katunayake, Sri Lanka January 24, 2020.

Bandaranaike international airport security officials wears masks as they inspect passengers using a scanner monitoring their temperature following the new coronavirus outbreak from China, at Bandaranaike international airport in Katunayake, Sri Lanka January 24, 2020.

Bandaranaike international airport security officials wears masks as they inspect passengers using a scanner monitoring their temperature following the new coronavirus outbreak in China, at Bandaranaike international airport in Katunayake, Sri Lanka January 24, 2020.

Medical personnel at Rome's Fiumicino airport prepare to check passengers arriving from China's Wuhan for signs of coronavirus in Rome, Italy, January 23, 2020.

Vietnam's Vice Minister of Health Nguyen Truong Son talks with a man at an isolated section of a hospital where two Chinese citizens had tested positive for coronavirus, in Ho Chi Minh city — Thanh Chung/VNA via REUTERS

Vietnam's Vice Minister of Health Nguyen Truong Son (R) talks with a man at an isolated section of a hospital where two Chinese citizens had tested positive for coronavirus, in Ho Chi Minh city, Vietnam January 23, 2020. Picture taken January 23, 2020.

A news conference following the second meeting of the International Health Regulations (IHR) Emergency Committee for Pneumonia due to the Novel Coronavirus 2019-nCoV in Geneva, Switzerland January 23, 2020.

A security officer in a protective mask checks the temperature of a passenger following the outbreak of a new coronavirus, at an expressway toll station on the eve of the Chinese Lunar New Year celebrations, in Xianning, a city bordering Wuhan to the north, Hubei province, China January 24, 2020.

People stand in front of the closed gate of Lama Temple, with a notice saying that the temple is closed for safety concerns following the outbreak of a new coronavirus on its gate, in Beijing, China January 24, 2020.

An official wears a protective mask and glasses at the arrivals hall of Suvarnabhumi Airport, as a measure to prevent the spread of coronavirus in Bangkok, Thailand January 24, 2020.

An official uses a thermal camera at the arrivals hall of Suvarnabhumi Airport as a measure to prevent the spread of coronavirus in Bangkok, Thailand January 24, 2020.

General view of a health centre in Ivalo — Lehtikuva/Tarmo Lehtosalo via REUTERS

The health centre's chief physician Outi Liisanantti (L) and Inari Municipality Mayor Toni K. Laine speak during a news conference at the centre in Ivalo, Finland January 24, 2020. On Thursday, two tourists visiting Finland from Wuhan, China went to the health centre, seeking treatment for flu-like symptoms. The tourists are suspected of being infected with the coronavirus.

A man walks past a notice for passengers about new coronavirus that has broken out in China, at Seoul railway station in Seoul, South Korea, January 23, 2020. Picture taken January 23, 2020.

Advisory sign hangs on door of health centre in Ivalo — Lehtikuva/Tarmo Lehtosalo via REUTERS

An advisory sign hangs on the door of the health centre in Ivalo, Finland January 24, 2020. On Thursday, two tourists visiting Finland from Wuhan, China went to the health centre, seeking treatment for flu-like symptoms. The tourists are suspected of being infected with the coronavirus.

Masks and hand sanitiser are layed out at health centre in Ivalo — Lehtikuva/Tarmo Lehtosalo via REUTERS

Masks and hand sanitiser are layed out on a tray at the health centre in Ivalo, Finland January 24, 2020. On Thursday, two tourists visiting Finland from Wuhan, China went to the health centre, seeking treatment for flu-like symptoms. The tourists are suspected of being infected with the coronavirus.

Flight crew wearing masks arrives on direct flight from China at Vancouver International Airport — REUTERS/Jennifer Gauthier

A flight crew, wearing masks, arrives on a direct flight from China, after Canada's Public Health Agency added a screening question for visitors and began displaying messages in several airports urging travellers to report flu-like symptoms in efforts to prevent any introduction of coronavirus at Vancouver International Airport in Richmond, British Columbia, Canada January 24, 2020.

Travellers wearing masks arrive on a direct flight from China at Vancouver International Airport — REUTERS/Jennifer Gauthier

A traveller wears a mask, after arriving on a direct flight from China, as Canada's Public Health Agency added a screening question for visitors and began displaying messages in several airports urging travellers to report flu-like symptoms in efforts to prevent any introduction of coronavirus, at Vancouver International Airport in Richmond, British Columbia, Canada January 24, 2020.

Travellers, wearing masks, arrive on a direct flight from China, after Canada's Public Health Agency added a screening question for visitors and began displaying messages in several airports urging travellers to report flu-like symptoms in efforts to prevent any introduction of coronavirus, at Vancouver International Airport in Richmond, British Columbia, Canada January 24, 2020.