The announcement that Donald Trump has appointed Robert F Kennedy as the US secretary of health and human services has sent shock waves through the health and scientific community. Kennedy ran as an independent presidential candidate before bowing out and supporting Trump’s run in exchange for an influential position, so we have a pretty good idea of his positions on public health.

The main goal Kennedy has trumpeted recently is to “Make America healthy again”. At face value, it’s a noble aim. That’s the essence of public health: how to reduce risk factors for disease and mortality at a population level and improve the quality of health and wellbeing. But behind this slogan comes a darker, conspiracy-laden agenda. As someone who has spent a lot of time researching global public health, these are the positions I believe could be the most dangerous.

Kennedy is well known as a prominent anti-vaxxer. He has claimed that vaccines can cause autism, and also said that “there’s no vaccine that is safe and effective”. He called the Covid-19 vaccine the “deadliest vaccine ever made”. None of these claims are true: repeat studies have shown that the MMR vaccine does not cause autism, we have numerous safe and effective vaccines against childhood killers such as whooping cough and measles, and the........

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