[During] the swine flu affair of 1976" ... a US president decided to rush a vaccine to the entire American population based on ill-founded science and political imprudence. The mistakes that followed hold lessons for today. Lawsuits, side-effects and negative media coverage followed, and the events dented confidence in public health for years to come. It began at a US Army training base. In February 1976, several soldiers at Fort Dix fell ill with a previously unrecognised swine flu. In March, President Ford announced a $137m (67.5m in 1976) effort to produce a vaccine by the autumn. Its goal was to immunise every man, woman and child in the US. The president himself was vaccinated on television on 14 October, further heightening perceptions that this was a politicised event. As has happened throughout the Covid-19 pandemic of 2020, the scientists could only give the best advice they could based on incomplete knowledge. As the months continued " still with no outbreak " new problems arose. Millions of vaccinations meant dozens of cases of Guillain-Barre syndrome, a rare problem where the body's immune system attacks the nerves. The swine flu strain spotted at Fort Dix was not dangerous, and there would be no pandemic. When politicians in the present day talk of "the science" as if it is a complete body of knowledge, a manual for what to do, it neglects the uncertainty of evidence and ignores that science is a human endeavour. The swine flu affair, the New York Times concluded, had been a "sorry debacle" and "fiasco" marked by political expediency and unwarranted confidence.