Banning sodas from school vending machines, building walking paths and playgrounds, adding supermarkets to food deserts and requiring nutritional labels on restaurant menus: Such changes to the ...

A unique vaccine rollout in Wales gave researchers an accidental natural experiment that revealed a striking reduction in dementia among seniors who received the shingles vaccine. The protective ...

A unique vaccination rollout in Wales offered researchers a natural experiment: some older adults qualified for the shingles vaccine, while others just missed the cutoff. The results were striking — ...