By Ana-Marija Dolaskie — Sep 18, 2025
Unlike measles or polio vaccines, which last a lifetime, the flu virus mutates constantly, so we need a new shot every year. This year’s quadrivalent vaccine targets four strains and cuts your risk of getting sick by about 40–60%. Even if it’s not a perfect match, it's always worth getting.
This is the video version of the latest article by Dr. Josh Bloom on flu vaccines. You can read it here.
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