The United States has donated another 3 million doses of the Pfizer COVID-19 vaccine to Bangladesh. The latest donation has brought total vaccine donations to Bangladesh over 64 million doses and counting, said the US Embassy on Friday. This shipment contains a new ready-to-go formulation of Pfizer vaccines that does not require mixing before being administered. READ: Global Vaccine Alliance, Bharat Biotech in talks over Covaxin use: Report This new mix can be stored for longer periods of time with minimal cold-chain capacity. These new vaccines also arrive just in time to support the launch of a new booster campaign, said the Embassy.