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Polio's Moving Target

Ewen Callaway Nature
Finding and vaccinating Nigerian nomads may be one of the last obstacles to the eradication of polio. Remote settlements in northern Nigeria remain a challenge for vaccine workers.

What’s the Matter With Vermont?

Helena Rho Slate
A pertussis vaccine became available in the 1940s, and incidence of the infection dropped from around 200,000 per year to barely over 1,000 by 1976. But today the United States is in the middle of a pertussis epidemic. The states with the most cases per capita are Wisconsin, Minnesota, and Vermont.
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