An Indonesian doctor gestures after getting a dose of the Sinovac's vaccine at a district health facility as Indonesia begins mass vaccination for the coronavirus disease (COVID-19), starting with its healthcare workers, in Jakarta, January 14, 2021. Health workers in Indonesia on Thurday (January 14) urged the general public to get vaccinated after the government expand a nationwide mass vaccination program to general public as new COVID-19 cases continue to hit record high each day. REUTERS/Willy Kurniawan

A doctor shows a barcode from his phone for registering to receive a dose of the Sinovac's vaccine at a district health facility as Indonesia begins mass vaccination for the coronavirus disease (COVID-19), starting with its healthcare workers, in Jakarta, January 14, 2021. Nearly 1.5 million health workers were first in line to be immunized in the world's fourth-most populous country after it became the first outside China to start mass vaccinations with Chinese company Sinovac Biotech's CoronaVac. REUTERS/Willy Kurniawan

A medical worker holds a dose of the Sinovac's vaccine at a district health facility as Indonesia begins mass vaccination for the coronavirus disease (COVID-19), starting with its healthcare workers, in Jakarta, January 14, 2021. Indonesia has said its trials showed CoronaVac has an efficacy rate of 65.3%, but Brazilian researchers said on Tuesday (January 12) the vaccine was only 50.4% effective. REUTERS/Willy Kurniawan

A healthcare worker prepares to administer a dose of the Sinovac's vaccine at a district health facility as Indonesia begins mass vaccination for the coronavirus disease (COVID-19), starting with its healthcare workers, in Jakarta, January 14, 2021. REUTERS/Willy Kurniawan

A doctor receives a dose of the Sinovac's vaccine at a district health facility as Indonesia begins mass vaccination for the coronavirus disease (COVID-19), starting with its healthcare workers, in Jakarta, January 14, 2021. REUTERS/Willy Kurniawan

A woman reacts while receiving a dose of the Sinovac's vaccine at a hospital, as Indonesia begins mass vaccination for the coronavirus disease (COVID-19), in Jakarta, January 14, 2021. REUTERS/Willy Kurniawan