The article says that one possible reason the vaccine protects against dementia is incidental protection from other diseases. Getting chickenpox as a kid might protect you against shingles, but maybe not against those other diseases.
Don't get chickenpox.
1. Not getting chickenpox at all. Highly desirable.
2. Getting chickenpox as a kid.
3. Getting chickenpox as an adult.
Sadly it came back positive for antibodies. I was really hoping I had somehow evaded it, and could get the vaccine as an adult.
or third. fifteenth.
We don’t track reinfection well.
We don’t really define infection well (especially in a context where you’re waiting 2-6 weeks for an appointment to get bloodwork ordered, by which point the blood is often irrelevant to the complaint 2-6 weeks prior).
Not in practice, anyway.