Source: South China Morning PostIt is official: the United States’ Covid-19 immunisation campaign is stalling.While vaccination programmes are lagging badly in many countries – if they have begun at all – mass vaccine sites across the US are closing due to dwindling demand, leaving the authorities exploring new ways to reach people who have not yet received a shot.The national vaccination rate peaked around April 11, according to official data, and although 55 per cent of US adults now have had one or more doses, there is…Read More