Top News2020-12-15 分享到： Trucks hauling trailers loaded with suitcase–sized containers of Covid-19 vaccine rolled out of Pfizer’s manufacturing facility in Kalamazoo, Michigan, on Sunday – launching the largest and most complex vaccine distribution project in the US. However, public confidence in the vaccine risked being eroded after President Donald Trump – who has had Covid – said he was “not scheduled to take the vaccine” but would do so “at the appropriate time”. Last week, former US presidents Barack Obama, George W Bush and Bill Clinton pledged to get vaccinated on television to promote the safety of the vaccine. Many Americans say they will not agree to be vaccinated against Covid-19. A poll by Gallup, released in mid-November, showed that 42% of the country would not take the vaccine even if it was “available right now at no cost”.