For families raising children with complex medical conditions, the measles resurgence has become a daily calculation. Parents who spoke with CIDRAP News described weighing school attendance, group activities, and flights to see specialists as the United States records its highest measles case count since 1991.
The newest federal figures sharpen that concern. As of Sept. 17, the CDC reported 3,471 confirmed measles cases in the United States this year, 177 more than the week before. Ninety-five percent of cases are tied to outbreaks, and the total is already far above the 2,289 cases counted in all of 2025.
For a child whose heart, lungs, or immune system is already under strain, a common virus can mean weeks in a hospital. These families depend on high vaccination rates in the people around them, and those rates have been slipping.
Families Describe Life Near an Active Outbreak
Maggie Gladson of New Oxford, Pennsylvania, lives close to the center of the state's outbreak. Her 14-year-old son, Charlie, has Cornelia de Lange syndrome and hypoplastic left heart syndrome, a condition in which the left side of the heart is underdeveloped. She told CIDRAP that viruses of unknown origin have sent him to the hospital for weeks at a time and that he has needed resuscitation more than once.
Charlie is up to date on his vaccines, but his mother said the uncertainty remains. "We don't know if his measles immunizations are still effective," she said. The family decided to keep him in school because he thrives on routine, a choice she described as balancing fears about his physical health against his overall well-being.
In Lewiston, Maine, Courtney Schadtle decided to homeschool her 5-year-old daughter, Violette, who has an HNRNPU gene deletion, a rare condition that causes seizures and developmental delays. When Violette had RSV, she had breakthrough seizures, and Schadtle said she now wonders whether group classes are worth the exposure.
In Klukwan, Alaska, Maggie Hotch's 15-year-old son, David, received a bone marrow transplant at 18 months old to treat a rare genetic disorder and had to repeat his childhood vaccines. The family flies to Seattle for specialist visits, and Hotch noted that measles exposures often occur in airports. All three families take part in Little Lobbyists, a family-led advocacy group for children with complex medical needs.
Coverage Gaps Behind the Worry
The families' fears track national data. According to CDC SchoolVaxView data, 92.4% of kindergartners completed the MMR series in the 2025-26 school year, down from a peak of 95.2% in 2019-20. About 280,000 kindergartners attended school without documentation of a complete MMR series. Health officials generally cite coverage of 95% or higher as the level needed for community protection.
Exemptions also rose, climbing from 3.6% to a record 4.2% of kindergartners. National averages can hide sharper local gaps, because unvaccinated children tend to cluster in the same schools and communities.
Pennsylvania shows the stakes. The state health department reported 767 confirmed cases across 38 counties as of Sept. 18, with 150 hospitalizations and four measles-associated deaths. The CDC's national count lists no 2026 measles deaths. The agency says federal death records do not yet show measles as the underlying cause of any 2026 death and that it is working with state epidemiologists on a standardized definition for measles deaths.
Children Facing the Highest Risk
Measles can be serious at any age, but the CDC lists children younger than 5, adults older than 20, pregnant people, and people with weakened immune systems among those most likely to develop complications. About 1 in 5 unvaccinated people in the United States who get measles is hospitalized, and pneumonia is the most common cause of measles death in young children.
Children with complex conditions often face several of those risks at once. Some cannot receive the live MMR vaccine for medical reasons, and others, like David Hotch, may have lost earlier vaccine protection because of treatment. Their safety depends heavily on whether classmates, caregivers, and neighbors are immune. Two doses of MMR are about 97% effective at preventing measles.
Protection Steps for Households and Caregivers
The first practical step is to confirm that every household member, including parents, siblings, grandparents, and regular caregivers, has documentation of two MMR doses or other evidence of immunity. Unsure adults can ask a clinician or pharmacist whether they need a dose.
The second is to ask the child's specialist about a measles exposure plan, including what to do after a known exposure and whether the child's immunity should be rechecked. In outbreak areas, public health officials may recommend an early MMR dose for infants 6 to 11 months old. That dose does not count toward the routine two-dose series.
The third is to check state health department exposure notices before travel. Early measles symptoms include high fever, cough, runny nose, and red, watery eyes, followed days later by a rash that starts on the face near the hairline. Anyone with those symptoms after a possible exposure should call ahead before visiting a clinic or emergency room so staff can prevent spread. Trouble breathing, confusion, seizures, or signs of dehydration require urgent care.
Cost should not block protection for most children. The federal Vaccines for Children program covers eligible uninsured, underinsured, and Medicaid-enrolled children, and most private insurance plans cover MMR at no cost. In Pennsylvania, children 18 and under who are uninsured, underinsured, or on Medicaid can get the vaccine at no cost at any of the state's 59 health centers.
It remains unclear how long current outbreaks will last. The CDC updates its national count weekly, and Pennsylvania's measles dashboard tracks cases, hospitalizations, and deaths in the state. For families like the Gladsons, each new county on an outbreak map is another place to plan around. For everyone else, checking vaccination records now is a useful step before the next exposure alert.
Key Questions Answered
How many measles cases has the U.S. reported in 2026?
The CDC reported 3,471 confirmed cases as of Sept. 17, 2026. That is 177 more than the prior week and well above the 2,289 cases reported in all of 2025.
Why are medically fragile children at higher risk?
Children with weakened immune systems or serious heart, lung, or neurological conditions are more likely to develop complications. Some cannot receive the live MMR vaccine, so they rely on immunity in the people around them.
Can a vaccinated child with a complex condition still get measles?
Breakthrough infections are uncommon but possible, and some treatments, such as bone marrow transplants, can wipe out earlier vaccine protection. Families should ask the child's specialist whether immunity needs to be rechecked.
What should caregivers of a medically fragile child do now?
Confirm that everyone in the household has two documented MMR doses, ask the child's care team about an exposure plan, and check state exposure notices before travel.
What symptoms should families watch for?
Early signs include high fever, cough, runny nose, and red, watery eyes, followed by a rash. Call ahead before going to a clinic, and seek urgent care for trouble breathing, confusion, or seizures.
Is the MMR vaccine free for children?
Most private insurance plans cover it at no cost, and the Vaccines for Children program covers eligible uninsured, underinsured, and Medicaid-enrolled children.
