A man wearing protective mask stands inside a commuter train in Jakarta, Indonesia March 2, 2020. Two Indonesians have tested positive for coronavirus after coming into contact with an infected Japanese national, President Joko Widodo said on Monday, marking the first confirmed cases in the world's fourth-most populous country. REUTERS/Willy Kurniawan

Indonesian President Joko Widodo talks as Indonesia's Health Minister Terawan Agus Putranto sits next to him during a news conference at Presidential Palace in Jakarta, Indonesia, March 2, 2020. A 64-year-old woman and her 31-year-old daughter had become infected after contact with a female Japanese visitor, who lived in Malaysia and had tested positive after returning from a trip to Indonesia, Widodo told reporters at the presidential palace. Antara Foto/Sigid Kurniawan

Women wearing protective masks stand as they wait for a commuter train at a station in Jakarta, Indonesia March 2, 2020. "The government is serious is dealing with the cases by preparing more than 100 hospitals equipped with isolation rooms and tools that meet international standards," Widodo said via Twitter. REUTERS/Willy Kurniawan

A woman wearing protective mask walks at a sidewalk in Jakarta, Indonesia March 2, 2020. The Japanese national was a friend of the two women's family and had visited their house in Depok on the outskirts of Jakarta, Health Minister Terawan Agus Putranto told reporters. Authorities were checking who else she may have come into contact with. REUTERS/Willy Kurniawan

Women wearing protective masks stand as they wait for a bus at a sidewalk in Jakarta, Indonesia March 2, 2020. The daughter and the Japanese woman went dancing at a venue in Jakarta on Feb. 14, Putranto said. The Japanese national informed the daughter on Feb. 28 that she had been infected. Two other people sharing the house with the infected Indonesians had not shown symptoms of coronavirus, he added. REUTERS/Willy Kurniawan

A woman wearing protective mask stands as she waits for a commuter train at a station in Jakarta, Indonesia March 2, 2020. Two Indonesians have tested positive for coronavirus after coming into contact with an infected Japanese national, President Joko Widodo said on Monday, marking the first confirmed cases in the world's fourth-most populous country. REUTERS/Willy Kurniawan