- Measles 2025
- 40
- 0 in 2024
- Measles rank
- #9/ 51
- 1 = most cases nationally
- Pertussis 2025
- 1,141
- whooping cough
- Mumps 2025
- 20
- MMR-preventable
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The Return of the Preventable / State detail
Colorado reported 40 measles cases in 2025 - ranked #9 of 51 states, against a national total of 2,026.