Reassuring people "not to worry" about public health issues like vaccination or fluoridated water doesn't work. Nor does telling people "don't panic". So, what does?
Some scientists refuse to debate or appear with those they consider to be unscientific. But is this the best approach to combat anti-science narratives?
When a high proportion of a community is immune it becomes hard for diseases to spread from person to person – a phenomenon known as herd immunity.