A health worker checks the body temperature of a passenger as precautionary measures to combat the spread of the novel coronavirus at a checkpoint in the southern entrance of Sanaa, Yemen, March 30, 2020. (Photo by Mohammed Mohammed/Xinhua)

A health worker checks the body temperature of a taxi driver as precautionary measures to combat the spread of the novel coronavirus at a checkpoint in the southern entrance of Sanaa, Yemen, March 30, 2020. (Photo by Mohammed Mohammed/Xinhua)

A health worker stands to check the body temperature of passengers as precautionary measures to combat the spread of the novel coronavirus at a checkpoint in the southern entrance of Sanaa, Yemen, March 30, 2020. (Photo by Mohammed Mohammed/Xinhua)