Beyond the needle, Part 2: If vaccines work, why doesn’t that settle the argument?
Much of what follows draws on well-known public health history and behavioural research, but the failure to integrate these insights has left vaccine debates stuck in the wrong register. And one of the frustrations in the vaccine debate is that both sides are, in a narrow sense, correct. Vaccines do work. The evidence is overwhelming. They reduce severe disease, hospitalization, and death. They train the immune system to recognize novel pathogens before those pathogens can overwhelm the body. This is not controversial science; it is settled biology, visible in everything from smallpox eradication to the differential outcomes of COVID-19 across populations. And yet, large numbers of people who are not ignorant, not conspiratorial, and not hostile to science still resist vaccination. Puzzlingly, many of them acknowledge that vaccines work —…
