More U.S. Parents Opt for Early Second Measles Shot as Cases Double

More U.S. parents are giving children an early second MMR (measles, mumps, rubella) dose, The Guardian reported October 30, 2026, as confirmed U.S. measles cases in 2026 reach twice last year's level. The CDC routinely recommends the second dose at ages 4 to 6, but says giving it as soon as four weeks after the first is an option.