A medical worker prepares a dose of the Sinovac's vaccine for the coronavirus disease (COVID-19) before giving it to a doctor at a district health facility in Jakarta, January 19, 2021. Indonesia plans to start giving the general public COVID-19 vaccinations sometime between late April to May, health minister Budi Gunadi Sadikin said on Thursday. REUTERS/Willy Kurniawan

Indonesian medical workers go through a health screening before receiving a dose of the the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker takes a temperature check before receiving a dose of the the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker receives a dose of the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian doctor shows a bottle of the Sinovac vaccine before receiving a dose of it, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), at a hospital in Jakarta, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker receives a dose of the Sinovac's vaccine for the coronavirus disease (COVID-19) at a district health facility in Jakarta, January 19, 2021. REUTERS/Willy Kurniawan