ABOUT MEASLES
Measles is a highly contagious viral disease that spreads through coughing, sneezing or simply being near someone infected. The virus can linger in the air for up to two hours after an infected person has left an area, making it easy to contract in shared spaces.
SYMPTOMS
- High fever
- Cough
- Runny nose
- Red, watery eyes
- Rash, typically starting on the face and spreading downward 2–5 days after initial symptoms
POTENTIAL COMPLICATIONS AND HIGH-RISK GROUPS
While measles can infect anyone, complications can be severe and include ear infections, diarrhea, pneumonia, or, in rare cases, brain inflammation (encephalitis). Those at the highest risk include:
- Infants and children under 5 years old
- Pregnant individuals
- People with weakened immune systems
PREVENTION
- Vaccination with the measles, mumps and rubella (MMR) vaccine is the most effective way to prevent measles.
- Two doses of the MMR vaccine provide a 97% protection rate and long-lasting immunity.
- The CDC and HHD recommend:
- The first dose at 12–15 months of age
- The second dose at 4–6 years of age
INFECTIOUS PERIOD
People with measles can spread the virus from four days before the rash appears to four days after.
VACCINE ACCESS IN HOUSTON
- Insured Individuals: Contact your healthcare provider or local pharmacy to check vaccine availability.
- Uninsured or Underinsured Individuals: Free or low-cost vaccines are available through the Vaccines for Children (VFC) or Adult Safety Net (ASN) programs.
For additional information about measles, symptoms, or vaccination, learn more from the CDC or contact the Houston Health Department at 832-393-4220.
WHAT TO DO IF EXPOSED OR SYMPTOMATIC
If you believe you have been exposed to measles or are experiencing symptoms:
- Isolate yourself immediately to prevent spreading the virus to others.
- Contact your healthcare provider by phone to arrange testing in a way that minimizes exposure to others.
- Watch for symptoms, which typically develop 7–21 days after exposure.
Measles Videos
We discuss Measles in 10 minutes.
Measles 101 in 10 minutes!
Key Points:
- Signs
- Community Data
- Symptoms
- Other health concerns
Resources
Learn more about HHD programs and services or call 832-393-4220.
Immunizations
We protect Houston communities from vaccine-preventable diseases.
Page last reviewed: July 14, 2026