Measles is a highly contagious viral infection that spreads through the air via droplets released when coughing, sneezing, or even talking. The virus can remain in the air for hours, making it easy to spread—especially indoors.
Although many people think of measles as a disease of the past, it remains a public health concern when vaccination coverage drops.
Measles is not a mild illness. In unvaccinated people, it can lead to serious complications—especially in:
Complications can include pneumonia, ear infections, severe dehydration, seizures, and brain inflammation with potential long-term neurological effects.
If you are not vaccinated
It often starts with high fever, persistent cough, runny nose, red eyes, and strong fatigue. A few days later, a rash appears—usually starting on the face and then spreading downward across the body.
If you are vaccinated
Vaccination may not prevent every exposure, but it typically changes the course of illness:
In Mexico, measles protection is mainly provided with the triple viral vaccine (SRP), which protects against measles, rubella, and mumps. In some “gap-closing” strategies, health services may also use the double viral vaccine (SR) for measles and rubella in specific age groups.
Mexico’s routine measles schedule includes two doses, and during an outbreak an additional early dose may be recommended:
For babies 6 to 11 months old when there is active virus circulation. This early dose does not replace the routine doses—it provides temporary, early protection.
Practical note: If your child has a first dose but you’re unsure about the second, it’s worth visiting your vaccination site now to review and catch up—especially during an active outbreak.
During outbreak control and catch-up, guidance commonly focuses on people ages 10 to 49 who:
Many adults over 50 may already have immunity from natural exposure in childhood, so they are not always prioritized for routine measles vaccination. However, decisions can vary based on health status and clinical context—especially for people with immune conditions or special risk. When in doubt, it should be individualized with a clinician. (This is a “case-by-case” area during outbreaks.)
This is common—and it should not stop you from getting protected.
When there is no clear proof of vaccination, health professionals often recommend vaccination to complete or reinforce immunity, because the risk of remaining unprotected is more concerning during outbreaks.
This is a very common question. In general, an additional dose is treated as a booster and is not expected to cause serious problems in most people.
Most people have no major symptoms. When they happen, they are usually mild and temporary:
Vaccination is the strongest protection. These steps also help:
If you’re an expat in the Riviera Maya (or anywhere in Mexico) and you’re unsure how to complete your measles vaccination status, here’s a practical approach:
During current vaccination campaigns, ISSSTE has publicly stated that vaccines are offered free of charge to the general population, regardless of whether you are a beneficiary—which helps many people who aren’t formally enrolled.
In practice, availability and exact requirements can vary by location, so it’s best to go early and ask specifically for measles vaccination (SRP/SR).
When you go to a vaccination point (IMSS/ISSSTE/health center), bring:
IMSS notes that the measles vaccine can be requested at an IMSS clinic by presenting a vaccination card—so documentation helps when you have it.
Mexico’s RENAPO has information on a temporary CURP for foreigners (with limited validity), which can help with administrative registration in some services.
If you’re on a temporary/permanent resident status, you can also explore formal IMSS registration options (separate from vaccination campaigns).
Mexico uses the Cartilla Nacional de Salud system, and government guidance notes you can request it at a medical unit near your home.
Even if you’re missing prior records, the local team can document what is administered moving forward.
If you can’t confirm your prior doses, the safest approach during an outbreak is to get vaccinated according to age-based guidance and local public health instructions (often focusing on ages 10–49 for catch-up/boosters).
Can I get vaccinated if I don’t remember my schedule?
Yes—when there’s no certainty, vaccination is commonly recommended to reduce risk during outbreaks.
Is measles vaccination only for children?
No—during outbreaks, catch-up is often recommended for teens and adults up to age 49.
Is it safe if I get an extra dose by mistake?
In most cases, it functions like a booster and is not expected to cause significant adverse effects.
Where should expats start?
Look for vaccination modules at public services (ISSSTE/IMSS/health centers), bring ID and any records you have, and ask for guidance on catch-up.
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