A nurse gives a shot of a COVID-19 vaccine to a colleague at a hospital in Medan, North Sumatra, Indonesia, Monday, Jan. 25, 2021. The world's fourth most populous country has started giving COVID-19 vaccine to health workers this month as its first stage of a plan to vaccinate two-thirds of its population of about 270 million people. (AP Photo/Binsar Bakkara), APTOPIX