A nurse displays vials of measles vaccine at the Orange County Health Department in May. Health officials said Thursday that new U.S. measles cases for 2019 so far have broken a 25-year-old record.
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A nurse displays vials of measles vaccine at the Orange County Health Department in May. Health officials said Thursday that new U.S. measles cases for 2019 so far have broken a 25-year-old record.