DHAKA : Bangladesh signed a deal with the Serum Institute of India on Thursday to buy 30 million doses of potential coronavirus vaccine being developed by British drugmaker AstraZeneca.AstraZeneca’s experimental COVID-19 vaccine is seen as one of the most advanced candidates in the race against the novel coronavirus."Whenever the vaccine is ready, the Serum Institute will give us 30 million doses in the first phase," health minister Zahid Maleque told reporters after the deal was signed in Dhaka.He said five million doses of vaccine per month would be purchased through Bangladesh's drug maker, Beximco Pharmaceuticals."We'll be able to vaccinate 15 million people as two shots of vaccine are required for each person 28 days apart," Maleque.