Aerial photo taken on April 20, 2020 shows a makeshift hospital for COVID-19 patients in Nur-Sultan, Kazakhstan. Kazakhstan has built a makeshift hospital to treat COVID-19 patients in 13 days in Nur-Sultan, the developer BI Group announced on Tuesday. (BI Group/Handout via Xinhua)

Construction workers and medical staff pose for photos at a makeshift hospital for COVID-19 patients in Nur-Sultan, Kazakhstan, April 19, 2020. Kazakhstan has built a makeshift hospital to treat COVID-19 patients in 13 days in Nur-Sultan, the developer BI Group announced on Tuesday. (BI Group/Handout via Xinhua)

Aerial photo taken on April 20, 2020 shows a makeshift hospital for COVID-19 patients in Nur-Sultan, Kazakhstan. Kazakhstan has built a makeshift hospital to treat COVID-19 patients in 13 days in Nur-Sultan, the developer BI Group announced on Tuesday. (BI Group/Handout via Xinhua)

Photo taken on April 19, 2020 shows a ward of a makeshift hospital for COVID-19 patients in Nur-Sultan, Kazakhstan. Kazakhstan has built a makeshift hospital to treat COVID-19 patients in 13 days in Nur-Sultan, the developer BI Group announced on Tuesday. (BI Group/Handout via Xinhua)

Photo taken on April 18, 2020 shows a makeshift hospital for COVID-19 patients in Nur-Sultan, Kazakhstan. Kazakhstan has built a makeshift hospital to treat COVID-19 patients in 13 days in Nur-Sultan, the developer BI Group announced on Tuesday. (BI Group/Handout via Xinhua)