MALI has chosen to use the AstraZeneca COVID-19 vaccine in its plan to initially immunise 4.2 million people, targeting medical staff, the elderly and those with comorbidities, the health minister has announced. Minister Fanta Siby said the vaccines, which unlike some others do not need to be stored at ultra-cold temperatures, would arrive at the end of March. "The vaccine that Mali has chosen, like most African countries, is the vaccine that keeps at +2 and +8 degrees," Siby told reporters. On Thursday the government said it wanted to buy more than 8.4 million doses of coronavirus vaccine, costing over…