Aviation security officers wearing medical masks stand guard at international arrival terminal of Soekarno Hatta airport near Jakarta, Indonesia, January 21, 2020.

A Thai Airways flight attendent offers meal service aboard an nearly empty 744 jumbo jet on a morning flight from Bangkok to Singapore May 10, 2003. Both Thailand and Singapore's tourist arrivals have fallen sharply due to the outbreak of Severe Acute Respiratory Syndrome (SARS). Analysts have forecast a second-quarter profit decline for Thai Airways in a range of 44 to 63 percent due to increased fuel prices and falling passenger numbers. Picture taken May 10, 2003.

A Chinese man afraid of a growing outbreak of SARS in Beijing wears a mask as he walks past shelves nearly emptied of instant noodles at a supermarket April 25, 2003. Residents in China's capital stocked up on daily necessities, like food, toilet paper and disinfectant, as more and more people try to go out as little as possible to keep from getting Severe Acute Respiratory Syndrome (SARS).

Migrant workers queue for medical checkup at a hospital in Beijing June 2, 2003. Local authorities have ordered all migrant workers who are working in China's capital to obtain health certificates from hospitals as a measure to control the spread of SARS. In Beijing, which has handled more SARS cases than any other city on earth, the World Health Organisation (WHO) said it was encouraged by the fall-off in numbers of cases and said it was aiming to eliminate SARS rather than just control it.

Chinese woman fixes her friend's protective masks against SARS, while strolling in Shanghai May 13, 2003. Almost two thirds of the world's cases of the flu-like SARS virus have occurred in China, where the government said on Monday 252 people had died and 5,013 had been infected by the disease.