Diseases such as measles, rubella and polio could become endemic to the US again if vaccine rates decline, according to researchers at Stanford Medicine. Even at current immunization rates, researchers predict that measles may become endemic again — circulating in the US — within two decades.

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3. Diseases such as measles, rubella and polio could become endemic to the US again if vaccine rates decline, according to researchers at Stanford Medicine. Even at current immunization rates, researchers predict that measles may become endemic again — circulating in the US — within two decades.