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Measles Outbreaks Surge in U.S.: Tracking Cases and Vaccination Gaps

Source: Map: Track the spread of measles in the U.S. (2025-11-19)

The recent NBC News investigation highlights a concerning rise in measles cases across the United States, with over 1,700 confirmed infections reported so far in 2025. This uptick underscores ongoing challenges in public health, including declining childhood vaccination rates and the spread of misinformation. The CDC continues to monitor outbreaks through a comprehensive tracker that maps cases, vaccination coverage, and regional hotspots. Recent data reveal that vaccination rates in some states have fallen below the herd immunity threshold of 95%, increasing vulnerability to outbreaks. Notably, measles remains highly contagious, with a basic reproduction number (R0) of 12-18, making herd immunity critical. The resurgence is also linked to increased travel, vaccine hesitancy fueled by misinformation campaigns, and gaps in healthcare access, especially in underserved communities. Experts warn that if vaccination coverage does not improve, the U.S. could see more frequent and severe outbreaks, reversing decades of progress in disease control. Public health officials are emphasizing the importance of vaccination, community outreach, and accurate information dissemination to combat this resurgence. The CDC is also working on targeted vaccination campaigns in high-risk areas and increasing public awareness through digital platforms. As the situation evolves, staying informed through reliable sources like the CDC and NBC News is vital for protecting yourself and your community from measles. The recent spike in cases serves as a stark reminder of the importance of maintaining high vaccination rates and addressing barriers to healthcare access to prevent future outbreaks.

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