In this Sunday, May 10, 2020, photo, the S11@Punggol complex of dormitory buildings for foreign workers are seen behind a row of trees in Singapore. A second wave of coronavirus infections in tightly packed foreign workers' dormitories has caught Singapore off guard, and exposed the danger of overlooking marginal groups in a health crisis. (AP Photo/YK Chan)

FILE - In this April 10, 2020, file photo, people wearing protective face masks exit a mall along the Orchard Road shopping belt in Singapore. A second wave of coronavirus infections in tightly packed foreign workers' dormitories has caught Singapore off guard, and exposed the danger of overlooking marginal groups in a health crisis. Infections in Singapore, an affluent Southeast Asian city-state of fewer than 6 million people, have jumped more than a hundredfold in two months — from 226 in mid-March to over 23,000, the most in Asia after China and India.(AP Photo/Yong Teck Lim, File)

FILE - In this March 14, 2020, photo, a couple wearing face masks walk past the Merlion statue in Singapore. A second wave of coronavirus infections in tightly packed foreign workers' dormitories has caught Singapore off guard, and exposed the danger of overlooking marginal groups in a health crisis. Infections in Singapore, an affluent Southeast Asian city-state of fewer than 6 million people, have jumped more than a hundredfold in two months — from 226 in mid-March to over 23,000, the most in Asia after China and India. (AP Photo/Ee Ming Toh, File)

In this Sunday, May 10, 2020, photo, people sit outside a building balcony at the S11@Punggol, a complex of dormitory buildings for foreign workers in Singapore. A second wave of coronavirus infections in tightly packed foreign workers' dormitories has caught Singapore off guard, and exposed the danger of overlooking marginal groups in a health crisis. (AP Photo/YK Chan)

FILE - In this April 19, 2020, file photo, a team of migrant workers from India trim the trees along Holland Road in Singapore. A second wave of coronavirus infections in tightly packed foreign workers' dormitories has caught Singapore off guard, and exposed the danger of overlooking marginal groups in a health crisis. Infections in Singapore, an affluent Southeast Asian city-state of fewer than 6 million people, have jumped more than a hundredfold in two months — from 226 in mid-March to over 23,000, the most in Asia after China and India. (AP Photo/YK Chan, File)

FILE - In this April 10, 2020, file photo, a foreign worker talks on the phone outside his room at the WestLite Toh Guan dormitory after it was declared an isolation area under the Infectious Diseases Act, following a spike in the number of COVID-19 cases in several foreign worker dormitories in Singapore. A second wave of coronavirus infections in tightly packed foreign workers' dormitories has caught Singapore off guard, and exposed the danger of overlooking marginal groups in a health crisis. Infections in Singapore, an affluent Southeast Asian city-state of fewer than 6 million people, have jumped more than a hundredfold in two months — from 226 in mid-March to over 23,000, the most in Asia after China and India.(AP Photo/Yong Teck Lim, File)