Traveling for Thanksgiving During Measles Outbreaks: Check Your Family's MMR

Thanksgiving is Thursday, November 26, about three weeks away. If your family is flying, driving to see relatives, or hosting a full house, this is a good week to make sure everyone's measles protection is in order. It doesn't take long, and it's much easier to sort out now than the week of the trip.

CDC notes that measles is not a seasonal virus, but it often spreads during busy travel times, including holidays, and in places where unvaccinated people are close together. This year, measles activity in the U.S. is higher than it has been in decades, so it's worth a quick check before you go.

Bottom line: Two doses of MMR vaccine are about 97% effective at preventing measles, and one dose is about 93% effective (CDC). For most families, checking records and catching up on any missing dose is the main step.

Where measles stands heading into the holiday

As of October 29, 2026, CDC reports 4,852 confirmed measles cases in the U.S. this year, from 47 jurisdictions (including 18 cases among international visitors). CDC counts 43 outbreaks in 2026, and 96% of cases (4,666 of 4,852) are outbreak-associated. CDC's figures are preliminary and update weekly.

State health departments post their own counts, often more often than CDC. Here is what four of them report for 2026:

• Pennsylvania: 1,426 confirmed cases across 44 counties as of October 30, 2026, with 268 hospitalizations (Pennsylvania Department of Health).
• Wisconsin: 392 confirmed cases as of October 30, 2026. The Wisconsin Department of Health Services says measles is spreading locally in the Southwest Wisconsin outbreak (Grant, Iowa, Lafayette and Vernon counties) and in Chippewa County.
• Ohio: 296 reported cases across 24 counties in 2026, per the Ohio Department of Health's infectious disease dashboard (checked November 2, 2026).
• Utah: 527 cases in 2026 (724 since the start of 2025), per the Utah Department of Health and Human Services dashboard with a report date of October 20, 2026. That dashboard showed no Utah residents diagnosed in the prior 3 weeks.

Counts change quickly, so check the state health department for wherever you're headed. Our outbreak map links to each one.

Your pre-Thanksgiving MMR check

1) Find everyone's records

Start with what you already have: a child's immunization card, a school or daycare record, or your doctor's patient portal. Most states also run an immunization registry that can look up past doses. If you can't find records for an adult, CDC says it's fine to get vaccinated: there's no harm in getting another MMR dose if you might already be immune.

2) Kids: two doses on the routine schedule

CDC recommends two MMR doses for all children: the first at 12 through 15 months and the second at 4 through 6 years. Doses must be at least 28 days apart. If your child is behind, call the pediatrician and ask about catching up.

3) Adults: at least one documented dose, and two for some

CDC recommends adults have at least one documented MMR dose unless they have other evidence of immunity (such as birth before 1957, lab evidence of immunity, or lab-confirmed measles). Some adults should have two doses, including college students, health care workers, international travelers, adults who live with or closely care for someone who is immunocompromised, and groups that public health officials identify as at higher risk during an outbreak.

CDC also notes that people vaccinated before 1968 with an inactivated (killed) measles vaccine, or a vaccine of unknown type, should get at least one dose of today's live vaccine. More detail is in our adult MMR guide and our post Do Adults Need a Second MMR Dose?

4) Babies under 12 months: it depends on where you're going

The routine first dose isn't given until 12 months, so this is where most parents have questions. The rules differ by trip:

• International travel: CDC recommends an early MMR dose for infants 6 through 11 months before any international trip. That early dose doesn't count toward the routine series, so the baby still gets two more doses after the first birthday.
• Domestic travel: There's no blanket CDC rule for an early dose before a trip within the U.S. CDC says public health authorities may recommend vaccination for infants 6 through 11 months who are at risk of exposure. Ask your pediatrician what makes sense for your trip.
• Pennsylvania's early dose is county-specific: The Pennsylvania Department of Health recommends an extra early "zero dose" for infants 6 through 11 months who live in or travel to the counties its measles dashboard flags for sustained community transmission. It applies only to those counties, not to all of Pennsylvania or other states. If your plans include Pennsylvania, check the PA DOH dashboard for the current county list and talk with your pediatrician.
• Under 6 months: CDC does not recommend measles vaccine for infants younger than 6 months. The best protection for them is making sure the people around them are vaccinated.

For more, read Early MMR Dose for Babies 6–11 Months: What Parents Should Know.

5) Timing: what the "2 weeks" advice actually covers

You may have seen the advice to get vaccinated at least 2 weeks before you leave. That CDC guidance is written for international travel: CDC says to plan for MMR at least 2 weeks before departing abroad, and that if the trip is less than 2 weeks away, you should still get a dose.

For a trip within the U.S., there's no set CDC deadline. If anyone in your family is missing a dose, talk with your doctor or pharmacist about timing. Getting it scheduled now leaves the most room before Thanksgiving.

6) Family members who can't get MMR

MMR is a live vaccine, so some people shouldn't get it or should wait, including people who are or may be pregnant and some people with weakened immune systems. CDC lists the full set of reasons to check with a provider first. If someone at your gathering falls into one of these groups, the people around them being fully vaccinated matters more. Their own clinician can advise on anything else.

If someone gets sick before or during the trip

• Don't travel sick. CDC's travel guidance is plain: do not travel if you are sick.
• Know the early signs. Measles usually starts with high fever, cough, runny nose, and red, watery eyes. The rash tends to appear 3 to 5 days after symptoms begin.
• Call before you go in. If you think someone has measles or was exposed, call the doctor, urgent care, or ER first so staff can keep others in the waiting room from being exposed.
• After an exposure, act quickly. CDC says MMR given within 72 hours of exposure may offer some protection, and immune globulin within 6 days may help some people at high risk. Your doctor or local health department can tell you what applies. See What to Do If You've Been Exposed to Measles.
• After international trips, watch for 3 weeks. CDC advises watching your health for 3 weeks after returning from abroad and calling a doctor if a fever and rash appear.

Quick recap

• Check everyone's MMR records now, while there's still time before Thanksgiving.
• Kids: two doses (12–15 months and 4–6 years). Adults: at least one documented dose; two for certain groups.
• Babies 6–11 months: early dose before international travel. For domestic trips, ask your pediatrician. Pennsylvania's early dose applies only to the counties it flags.
• The "at least 2 weeks before" advice is CDC's guidance for international travel. For domestic travel, talk with your doctor about timing.
• If someone is sick, stay home and call ahead before visiting a clinic.

Sources

• CDC: Measles Cases and Outbreaks (data as of October 29, 2026)
• CDC: Plan for Travel (Measles)
• CDC: Measles Vaccination
• Pennsylvania Department of Health: Statewide Update on Measles Outbreak as Cases Reach 1,426 in 44 Counties (October 30, 2026)
• Pennsylvania Department of Health: Measles Dashboard and Guidance
• Wisconsin Department of Health Services: Outbreaks and Investigations (measles, updated October 30, 2026)
• Ohio Department of Health: Summary of Infectious Diseases in Ohio dashboard (checked November 2, 2026)
• Utah Department of Health and Human Services: Utah Measles Dashboard (report date October 20, 2026)

This article is for general informational purposes only and is not a substitute for professional medical advice. Always consult your physician, pediatrician, pharmacist, or local health department for medical decisions regarding your household.