Alzheimer's: The heretical and hopeful role of infection (bbc.com)

>Crucially, some of the participants were given antiviral drugs to treat the infection. As the infection hypothesis predicted, this reduced the risk of dementia. Overall, those taking a long course of medication were around 90% less likely to develop dementia over the 10-year study period than the participants who had not received any treatment for their infection.

This is wild, I had never heard of this.