The state alert lists seven cases among children ages 0 to 9, two among people ages 10 to 19 and 13 among adults. The count covers confirmed cases, not people who may have been exposed or are being monitored.

What changed in Delaware

The Delaware Division of Public Health updates its measles count by noon on Mondays, Wednesdays and Fridays. The number can change after publication, and the state’s count may not match the Centers for Disease Control and Prevention’s weekly total because the agencies use different reporting schedules.

All 22 confirmed cases currently listed by Delaware are in Kent County. The current alert does not establish statewide transmission.

How the outbreak began

DPH reported Delaware’s first confirmed measles case in more than a decade on July 20, 2026. Two days later, the agency reported two additional positive cases, bringing the total to four, and declared an outbreak.

The CDC defines a measles outbreak as three or more related cases. When the outbreak was declared, DPH said the cases identified at that point were unvaccinated adult males in Kent County. That description applied to the initial cases and does not establish the vaccination status or demographics of all 22 current cases.

What contact tracing is doing

Contact tracing is intended to identify people who may have been exposed, check their measles vaccination status, provide information and recommend treatment when appropriate. DPH said it would provide additional information if investigators identify known public-exposure locations.

People who have been notified of a possible exposure should contact a health care provider promptly. Pregnant people, immunocompromised people and children younger than 6 months may need specific guidance after exposure.

How residents can check MMR records

Delaware residents can review their own and their children’s vaccination records through the DelVAX Public Portal. People who cannot find their records there should contact a health care provider or consult the state’s public-health clinic information.

Two doses of the measles, mumps and rubella vaccine are about 97% effective at preventing measles, according to the Delaware alert and the CDC. Residents who are unsure whether they have received both doses should ask a provider what action is appropriate rather than relying on memory. Vaccine availability can vary, so residents should call a preferred facility before going.

Symptoms and when to call ahead

Early measles symptoms can include fever, cough, a runny nose and pink eye. A rash typically appears three to five days after those symptoms begin, usually starting on the face and spreading down the body.

Anyone with possible measles symptoms or a known exposure should call a health care provider before arriving at a clinic, doctor’s office or emergency department. The provider and any medical transport should be told about the possible exposure so staff can reduce the risk of exposing other patients and workers.

People with severe symptoms should seek emergency care, but should call ahead when possible. Residents without a regular provider can use the state’s public-health clinic information to identify a facility and should call before going to confirm instructions and availability.

Who faces the greatest risk

DPH identifies unvaccinated people, pregnant people, immunocompromised people and those too young to be vaccinated as groups at greatest risk of serious measles complications. Measles can lead to pneumonia, brain inflammation and, in severe cases, death.

Delaware’s current alert will continue to be updated on the Monday-Wednesday-Friday schedule. Residents should check the state’s measles information before making decisions about possible exposure, vaccination records or care.

Sources

• Delaware measles public-health alert
• Delaware DPH outbreak declaration
• CDC measles cases and outbreaks

The latest county-level figure should come from the Pennsylvania Department of Health measles dashboard. Case totals can change as reports are confirmed, updated or added.

Why earlier reports showed different numbers

A July 20 report from 90.5 WESA cited 63 Lancaster County cases since January. That was a dated snapshot, not a competing estimate of the July 27 statewide total. The newer figure covers Pennsylvania cases reported through July 27, while the Axios report described Lancaster County as an approximate share of that total.

Axios also reported 26 hospitalizations and no deaths in Pennsylvania this year as of its July 28 report. Lancaster County is part of the Lancaster-Lebanon public-health response region, where state and local officials have focused on vaccination access, outreach and provider education.

How residents can follow the numbers

The state dashboard tracks cases by county and includes information such as age, hospitalization and vaccination status. It is not a real-time feed. The Department of Health says it updates the dashboard on Monday, Wednesday and Friday afternoons with the latest available data.

The department reported July 14 that state health-center staff had administered more than three times as many measles vaccinations in Lancaster County in 2026 as during all of 2025. Pop-up clinics had provided more than 600 doses to county residents since cases were first identified there in late April.

What residents should do

Two doses of measles, mumps and rubella vaccine provide the best protection. Residents should check their vaccination records or ask a health-care provider whether they have received both doses. People who were vaccinated in Pennsylvania can request state immunization records. If records cannot be found, WESA reported that a health-care provider can discuss whether an antibody test is appropriate.

Symptoms can appear seven to 21 days after exposure. Watch for fever, cough, runny nose, red or watery eyes and a rash that often begins on the head and spreads downward. Anyone who may have been exposed or develops symptoms should contact a health-care provider promptly and explain the possible measles exposure. Call before arriving at a clinic or emergency department so staff can provide instructions that reduce the risk of exposing other patients.

Who needs extra caution

Infants younger than 12 months are not on the routine MMR schedule. During the current outbreak, however, Pennsylvania has authorized providers to give some infants ages 6 to 11 months an early dose for temporary protection; families should ask a health-care provider whether that guidance applies. The early dose does not replace the routine doses later in childhood.

Pregnant people who are not immune and residents with weakened immune systems should contact a medical professional promptly after a possible exposure because management may differ. Lancaster County advises people who may have been exposed and are not immune to take precautions around unvaccinated or medically vulnerable household members while awaiting guidance.

The next developments to watch are the scheduled dashboard updates, official exposure notices, new vaccination opportunities and any changes in guidance from Lancaster County or the Pennsylvania Department of Health. Residents should check the date attached to each case count rather than compare figures without noting when they were reported.

Sources

• Pennsylvania Department of Health measles dashboard and guidance
• Lancaster County measles information page
• Axios Philadelphia report on Pennsylvania measles cases
• 90.5 WESA report on Pennsylvania measles dashboard

Community Health Alliance has school-based clinics scheduled from Tuesday, July 28, through Thursday, August 6, at schools in Reno and Sparks. Northern Nevada Public Health also lists vaccination events on Saturday, August 1, and Saturday, August 8.

What Washoe County students should check

Washoe County School District says required immunizations must be current for enrollment. The district identifies the meningococcal vaccine, also called MCV4 or MenACWY, and Tdap as requirements for all Nevada seventh graders and for new students in grades 7 through 12 enrolling in the district.

Students entering 12th grade in Nevada schools must receive the MenACWY, or MCV4, vaccine. That does not mean every student needs every vaccine offered at the clinics. Families should review the child’s immunization record first, identify missing doses and ask the district or provider what documentation is needed.

Remaining Northern Nevada Public Health events

Northern Nevada Public Health lists a Family Health Festival from 9 a.m. to noon on Saturday, August 1, at Hug High School, 3530 Sullivan Lane in Sparks. A second event is scheduled from 8 a.m. to 1 p.m. on Saturday, August 8, at Northern Nevada Public Health, 1001 E. Ninth St. in Reno.

The events focus on students ages 4 through 18. Appointments are recommended but not required, and families should expect longer waits without one. Northern Nevada Public Health says all minors must be accompanied by a parent or legal guardian.

Families should bring identification, the child’s insurance card if available and vaccination records. If the child’s records are not in Nevada, parents should bring out-of-state or out-of-country records. Northern Nevada Public Health says children without insurance can receive vaccines at these events without a charge.

Community Health Alliance school clinics

Community Health Alliance’s remaining school-based clinics are scheduled for July 28 at Swope Middle School, July 29 at Traner Middle School, July 30 at Spanish Springs High School, August 4 at North Valleys High School, August 5 at Mendive Middle School and August 6 at Hug High School. Each clinic is listed from 2 to 5:30 p.m.

Appointments are preferred when available, and walk-ins are welcome, although the provider warns that wait times may be long. A parent or legal guardian must be present. Community Health Alliance asks families to bring identification, an insurance card, clothing that allows access to the arm or leg and a completed vaccine consent form. The clinics serve students entering kindergarten and older.

Another option for uninsured children

Catholic Charities of Northern Nevada provides vaccines for children through Nevada’s Vaccines for Children program. Children must be under 18 and either enrolled in Medicaid or uninsured. A legal parent or guardian must be present, and permission notes are not accepted.

Families must complete a medical screening form. Catholic Charities says vaccines are based on availability and that supplies are not guaranteed, so families should confirm current participation and availability before traveling.

Checklist before booking

• Locate the child’s current immunization record.
• Check which doses are missing and whether the child is entering seventh or 12th grade.
• Confirm the clinic date, location, age range, appointment process and walk-in policy.
• Verify insurance or uninsured eligibility with the provider.
• Bring identification, insurance information, vaccination records and any required consent forms.
• Contact Washoe County School District Student Health Services with enrollment-specific questions.

Clinic dates, appointment slots and walk-in availability can change. Families should check the provider’s current page before leaving home.

Sources

• Northern Nevada Public Health vaccination events
• Community Health Alliance back-to-school vaccination schedule
• Washoe County School District immunization requirements
• Catholic Charities of Northern Nevada nursing and vaccines