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Reader wonders if older vaccines still provide protection

DEAR DR. ROACH: With the resurgence of measles because of declining vaccination rates, should we be wary of the same happening with smallpox (which was also thought to have been eradicated)? And as an aside, is my ancient smallpox vaccination of 1952 still protecting me? What about my equally ancient (circa 1962) polio vaccine? -- C.C.ANSWER: At the time of this writing, the 2024-2025 measles outbreak is the largest in a few years and the first to include measles deaths in 10 years.

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