KATE KELLAND and STEPHANIE NEBEHAY A facility set up by the World Health Organization (WHO) and the GAVI vaccine group has exceeded an interim target of raising more than $2 billion to buy and distribute COVID-19 shots for poorer countries but said it still needs more. The GAVI alliance has announced that the funds for an advance market commitment (AMC) will allow the COVAX facility to buy an initial one billion vaccine doses for 92 eligible countries which would not otherwise be able to afford them. "We've seen sovereign and private donors from across the world dig deep and meet…