Passengers of a charter flight wait for boarding at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A crew member of a charter flight makes preparations at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A crew member of a charter flight makes preparations for passengers at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

Crew members of a charter flight make preparations for passengers at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

Passengers of a charter flight wait for boarding at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A crew member of a charter flight makes preparations for passengers at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A crew member of a charter flight makes preparations for passengers at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

Crew members of a charter flight take body temperature of a passenger before boarding at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

Crew members of a charter flight make preparations for passengers at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

Crew members of a charter flight take body temperature of a passenger before boarding at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A staff member checks body temperature of charter flight passengers at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A passenger of a charter flight waits for boarding at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

Passengers of a charter flight wait for boarding at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)

A staff member takes body temperature of a girl at Singapore Changi Airport in Singapore, Feb. 5, 2020. China dispatched a charter flight Wednesday to fly 147 stranded Hubei residents home from Singapore following the novel coronavirus outbreak. (Photo by Then Chih Wey/Xinhua)