🧠💉 "Shots, Shingles, and Sharp Minds: The Brain-Boosting Power of a Vaccine

💉 A natural experiment in Wales showed that the shingles vaccine (Zostavax) reduced dementia risk by 20% over 7 years. 🧠 The study used a clever birthdate cutoff to mimic randomization and avoid confounding. 👩‍🔬 Women benefited more, suggesting immune or viral mechanisms beyond shingles prevention. 📊 Findings offer hope for low-cost, brain-protective interventions in aging populations.