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The CDC reports flu cases in Pennsylvania and Delaware are in the "high" category, while New Jersey is seeing "very high" numbers as the virus spreads nationwide.
Dr. Delana Wardlaw, a family medicine physician, said these new recommendations will create doubt and confusion for parents.
Medical experts slammed the move, saying it could lead to reduced uptake of important vaccinations and increase disease.
The United States reported more than 2,000 measles cases in 2025, federal data shows, a higher annual total than the country has seen in decades.
This flu season seems to be getting worse by the day, according to health officials. The bulk of this year's cases are being linked to a new variant known as subclade K.