Sri Lankan health officials attend a mock COVID-19 vaccination drive in Piliyandala, Sri Lanka, Saturday, Jan. 23, 2021. Sri Lanka has begun rehearsals to administer COVID-19 vaccines to its health workers a day after the government approved Oxford-AstraZeneca vaccines for emergency use in the country. The island nation has seen a spike in infections and deaths in recent months with more than 52,000 positive cases and 265 deaths reported from October. (AP Photo/Eranga Jayawardena)