National outbreaks of fake news and partisan “disinformation” have convinced many Americans to doubt scientific consensus—such as the near-unanimous agreement among experts that human-caused climate change is real and a global threat and that vaccines are safe, effective, and live-saving.

While respectable media outlets are scrambling to fact-check and refute such “merchants of doubt,” a group of researchers, led by a psychologist at Cambridge, think they can stamp out the viral spread of fake news and lies just like we stamp out every other infectious disease—with vaccinations.

Their ‘mental inoculation’ works under the same principal as actual innoculations—that is, exposure to a weakened version or fragment of some nasty contagion can allow a person to recognize and develop immunity to future threats. In their study, the researchers found that they could effectively ‘vaccinate’ Americans from climate change misinformation by presenting them with information on the scientific consensus alongside a pre-emptive caution that some politically motivated groups are spreading lies about that consensus.