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When it comes to vaccines, President Donald Trump’s instincts have sometimes been sound. In May 2020 he launched Operation Warp Speed, which came up with inoculations for covid-19, based on a new mRNA technology, at an unprecedented pace and scale. By one estimate, covid vaccines averted 18.5m hospitalisations and 3.2m deaths in America in two years. And Mr Trump wisely got himself jabbed. So why is he now letting his health secretary, Robert F. Kennedy junior, dismantle the country’s vaccine-making ecosystem?
