Prevention & immunity
Understand how your body defends itself and what lowers your chances of getting sick — from vaccines and seasonal infections to coming back after an illness.
Most read
October 10, 2026
When to get a flu shot in 2026: the best time, side effects, and myths vs facts
September or October is the sweet spot for most adults, a later shot still helps while flu circulates, and the shot cannot give you the flu
Vaccines
October 10, 2026
Vaccine side effects: what's normal after shingles, flu, RSV, pneumonia, tetanus and MMR shots
Most reactions are a sore arm, tiredness or a low fever that pass in one to three days; here is what to expect after each vaccine, and the rare signs that need a doctor
Vaccines
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Latest articles
Vaccine side effects: what's normal after shingles, flu, RSV, pneumonia, tetanus and MMR shots
Vaccines
October 10, 2026
When to get a flu shot in 2026: the best time, side effects, and myths vs facts
Vaccines
October 10, 2026
Flu shot for kids: a 2026–27 guide by age, from babies to teens
Vaccines
October 10, 2026