Construction workers wearing face masks assemble partition walls as they convert the Rizal Memorial Coliseum into a quarantine spot to contain the spread of novel coronavirus in Manila, the Philippines on April 3, 2020. (Xinhua/Rouelle Umali)

A construction worker wearing a face mask works at the Rizal Memorial Coliseum which is being converted into a quarantine spot to contain the spread of novel coronavirus in Manila, the Philippines on April 3, 2020. (Xinhua/Rouelle Umali)

Construction workers wearing face masks assemble partition walls as they convert the Rizal Memorial Coliseum into a quarantine spot to contain the spread of novel coronavirus in Manila, the Philippines on April 3, 2020. (Xinhua/Rouelle Umali)

A construction worker wearing a face mask works at the Rizal Memorial Coliseum which is being converted into a quarantine spot to contain the spread of novel coronavirus in Manila, the Philippines on April 3, 2020. (Xinhua/Rouelle Umali)

Construction workers wearing face masks work at the Rizal Memorial Coliseum which is being converted into a quarantine spot to contain the spread of novel coronavirus in Manila, the Philippines on April 3, 2020. (Xinhua/Rouelle Umali)

Construction workers wearing face masks work at the Rizal Memorial Coliseum which is being converted into a quarantine spot to contain the spread of novel coronavirus in Manila, the Philippines on April 3, 2020. (Xinhua/Rouelle Umali)