Published: 2022-01-21 15:27:41 BdST
The country is among the first few countries to recommend boosters for that age group, following Germany, the United States, Israel and Hungary.
Many countries are expanding COVID-19 vaccine booster programmes or shortening the gap between shots as governments scramble to shore up protection against the rapidly spreading Omicron variant.
Studies have shown an initial course of COVID-19 vaccines - typically given in two doses - may not be enough to halt infection from Omicron, but a booster shot may help.
The World Health Organization has said in recent months that administering primary doses - rather than boosters - should be the priority, though it has recommended boosters for those with health issues or who received an inactivated vaccine.