Medical staff in personal protective equipment wait to conduct novel coronavirus tests for people at Dharavi, Asia's largest slum, in Mumbai, India, April 18, 2020. (Photos: Xinhua)

A man receives a novel coronavirus test at Dharavi, Asia's largest slum, in Mumbai, India, April 18, 2020.

A girl receives a novel coronavirus test at Dharavi, Asia's largest slum, in Mumbai, India, April 16, 2020.

Medical staff in personal protective equipment wait to conduct novel coronavirus tests for people at Dharavi, Asia's largest slum, in Mumbai, India, April 18, 2020.