What the 2025 measles numbers show so far
The number of measles cases reported in the United States in 2025 depends on when you are reading this, because case counts change weekly as health departments report new infections. The Centers for Disease Control and Prevention (CDC) publishes updated numbers every week, usually on Thursdays, on their measles tracking page. As of early 2025, case numbers remain far below the peaks seen in 2019 and 2024, but the exact current total is something you should check directly with the CDC rather than rely on a number printed here.
Measles cases are reported by state health departments to the CDC, which means there is always a lag between when someone gets sick and when the case appears in the national count. A case confirmed today may not show up in the weekly report for several days. This is why the CDC publishes provisional numbers that get updated as more information comes in.
Key Takeaways
- The CDC updates measles case counts weekly on their website, and the current 2025 total changes as new cases are reported by states.
- Measles cases in 2025 have remained significantly lower than the outbreaks of 2019 and 2024, when hundreds of cases were reported.
- Most 2025 cases have been linked to travel from countries where measles is still common, or to unvaccinated people in close contact with travelers.
- You can find the most current case count and state-by-state breakdown on the CDC's measles webpage, updated every week.
Where to find the current 2025 case count
The CDC measles webpage is the only source that updates in real time as cases are reported. You can visit cdc.gov/measles and look for the section labeled "Current Measles Outbreak" or "2025 Measles Cases" — the exact wording changes, but the page always shows the latest weekly total and a map of which states have reported cases.
Each state health department also maintains its own measles count, which may be slightly ahead of the national CDC number because states report to the CDC with a short delay. If you want to know specifically about measles in your state, your state health department website will have the most current information for your area.
How 2025 compares to recent years
In 2024, the United States saw a significant increase in measles cases compared to 2023, with cases concentrated in specific communities and linked to international travel. In 2019, during the largest measles outbreak in decades, over 1,200 cases were reported across the country. The 2025 numbers have not approached either of those peaks, which reflects higher vaccination rates in most parts of the country.
The pattern in recent years shows that measles outbreaks in the United States are almost always triggered by someone bringing the virus back from another country where measles is still spreading. Once a case arrives, whether it spreads further depends almost entirely on vaccination rates in that community. Communities with vaccination rates above 95 percent see the virus die out quickly. Communities with lower vaccination rates can see rapid spread.
Why case counts matter less than vaccination rates
A single measles case count number tells you less than you might think. What matters more is whether measles is spreading in your community or just passing through. A traveler who brings measles home and infects no one else is one case. The same traveler in an area with low vaccination rates can spark dozens of cases. The CDC tracks both the total case count and the pattern of spread — whether cases are isolated or clustered.
If you are trying to understand your own risk, the vaccination rate in your community matters more than the national case count. You can ask your local health department what percentage of children in your area are vaccinated against measles, and whether any cases have been reported nearby. That information is more useful for your own decision-making than a national number.
What happens when a measles case is reported
When someone is diagnosed with measles, their local health department is notified and begins what is called contact tracing — identifying everyone the person was around while they were contagious. Health officials then reach out to those contacts to watch for symptoms and, if they are unvaccinated, to offer vaccination or other preventive measures. This is why measles cases reported in the news are usually followed by announcements about specific locations where people may have been exposed.
The CDC also investigates whether each case was acquired locally or brought in from travel. Cases tied to travel are tracked separately from cases that represent ongoing spread in a community. This distinction helps public health officials understand whether measles is establishing itself in a particular area or whether it is being contained.
How vaccination affects case numbers
Measles vaccination rates directly determine whether a case becomes an outbreak. The measles vaccine is about 97 percent effective at preventing infection after two doses, and it has been part of routine childhood vaccination in the United States since the 1960s. In areas where vaccination rates are high, measles cases remain rare and isolated. In areas where vaccination rates have dropped, cases can spread rapidly through schools and communities.
The 2024 outbreak showed this pattern clearly: cases clustered in specific communities with lower vaccination rates, while most of the country saw no measles at all. If you are concerned about measles risk in your area, checking your local vaccination rate is more informative than checking the national case count.
Frequently Asked Questions
Where can I see measles cases reported in my state?
Your state health department website has a measles page with current case counts and locations. You can also call your local health department directly and ask whether any measles cases have been reported in your county or city. The CDC website shows cases by state on a map.
Does a low case count mean measles is not a risk?
Not necessarily. A low national count can hide high risk in specific communities with low vaccination rates. A single case in an unvaccinated school can spread quickly. Your local vaccination rate matters more than the national case count for understanding your own risk.
Why do case numbers change week to week?
Health departments report new confirmed cases to the CDC throughout the week, and the CDC publishes updated totals weekly. Some weeks bring more reports than others. The CDC also sometimes revises previous numbers as more information comes in about where cases came from.
What should I do if measles is reported near me?
Check whether you and your family are vaccinated. If you are not sure, contact your doctor. If you have been around someone with measles and are not vaccinated, contact your health department immediately — vaccination within 72 hours of exposure can prevent infection.