This article makes a link between flu infection and increased risk of developing Parkinson’s disease later in life. It makes me wonder if a person’s history with viruses and other infections has a more significant effect on the brain than the average person things. There has been so much talk and worry about the effects of Covid-19 on the brain, but I wonder if a lot of viruses have these effects and Covid-19 is just the one we happen to have studied incredibly intensively over the past 2 years. It’s a disturbing thought, but also suggests that vaccines for certain viruses earlier in life could reduce risk of developing dementia later in life.