Colorado’s measles vaccination rate is just a bit too low for herd immunity

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A bottle of the MMR vaccine photographed in Lubbock, Texas, where a measles outbreak has sickened dozens.
Mary Conlon/AP Photo
FILE, A vial of the measles, mumps and rubella vaccine is on display at the Lubbock Health Department, Wednesday, Feb. 26, 2025, in Lubbock, Texas.