Measles Exposure

Is this your child's symptom?

  • Exposure (close contact) to person with confirmed measles.
  • Your child has no symptoms of measles (rash, cough or fever).

Measles Exposure (Close Contact): Definition

Being near an infected person puts you at risk for getting measles. Examples of close contact are:

  • Living in the same house. Household contacts have the highest risk of catching measles.
  • For young children, being in the same childcare room or carpool.
  • Sharing eating utensils or drinking glasses.
  • Face-to-face contact such as kissing or hugging.
  • Being coughed or sneezed on.
  • Having prolonged close conversation (within 6 feet) of an infected person.
  • Caution: measles is one of the most contagious of all viruses. Even casual contact in the same school can put unvaccinated children at risk for infection.

Measles Transmission: How it Spreads

  • Cause: measles is caused by the Measles virus.
  • Spread: measles is a very contagious virus. Reason: It is spread by tiny airborne particles that carry the virus and can float in the air. These can remain in a closed area for up to 2 hours after the person with measles has left.
  • Also, respiratory droplets from coughing or sneezing on other people can spread the virus. They can cause disease by getting in the eyes, nose or mouth.
  • Incubation period: 10 to 12 days to onset of respiratory symptoms. Another 2 to 4 days to onset of the measles rash. Average time from exposure to rash is 14 days (range: 7 to 21 days).
  • Contagious period: from 4 days before until 4 days after the start of the rash.
  • Attack rate: the chance of getting measles after exposure is over 90% in unvaccinated persons

Measles (MMR) Vaccine: Age When Normally Given (AAP)

  • All children need to get their measles vaccines.
  • Children normally get their first vaccine at age 12 months. This gives 95% protection.
  • Children normally get their second vaccine (booster) at age 4 years. This gives 99% protection.
  • Protection against measles infections is permanent and lifelong.

Measles Symptoms

  • Measles starts with red eyes, runny nose, cough and fever. Respiratory symptoms continue for 2 to 5 days before the onset of the measles rash.
  • Koplik spots are tiny white specks on the lining of the mouth (inner cheeks). They appear 1 to 2 days before the onset of the rash. These are only seen with measles but can be difficulty to see.
  • The measles rash starts on day 2 to 5 of the illness. It's a blotchy red rash that starts on the face. The rash spreads downward to involve the entire body over the next 3 days. The rash is deep red. The rash is usually gone by 7 days.

When to Call for Measles Exposure

When to Call for Measles Exposure

Call 911 Now

  • Severe trouble breathing (struggling for each breath; can barely speak or cry)

Go to ER Now

  • Difficult to awaken or confused when awake

Call Doctor or Seek Care Now

  • Trouble breathing, but not severe
  • Severe headache
  • Your child looks or acts very sick

Contact Doctor Within 24 Hours

  • Age less than 12 months, exposed to measles within last 6 days, and never received measles (MMR) vaccine or had measles disease. Reason: vaccine can protect
  • Age 12 months or older, exposed to measles within last 72 hours and never received measles (MMR) vaccine or had measles disease. Reason: vaccine can protect
  • High-risk patient (such as pregnant, weak immune system), exposure to measles within last 6 days, and never received measles (MMR) vaccine or had measles disease. Reason: vaccine can protect.
  • You think your child needs to be seen, but the problem is not urgent

Contact Doctor During Office Hours

  • Measles exposure, never received measles (MMR) vaccine or had measles disease and NO symptoms. Reason: vaccine is needed
  • Widespread local community outbreak of measles, child 6 - 11 months old, but NO known exposure yet. Reason: high risk age and vaccine could protect.
  • You have other questions or concerns

Self Care at Home

  • Exposed to measles over 21 days ago and NO measles symptoms. Reason: no longer at risk for infection.
  • Measles exposure, but has already received measles (MMR) vaccine or had measles disease, and NO symptoms
  • Measles exposure (close contact) – how to protect others

Call 911 Now

  • Severe trouble breathing (struggling for each breath; can barely speak or cry)

Go to ER Now

  • Difficult to awaken or confused when awake

Call Doctor or Seek Care Now

  • Trouble breathing, but not severe
  • Severe headache
  • Your child looks or acts very sick

Contact Doctor Within 24 Hours

  • Age less than 12 months, exposed to measles within last 6 days, and never received measles (MMR) vaccine or had measles disease. Reason: vaccine can protect
  • Age 12 months or older, exposed to measles within last 72 hours and never received measles (MMR) vaccine or had measles disease. Reason: vaccine can protect
  • High-risk patient (such as pregnant, weak immune system), exposure to measles within last 6 days, and never received measles (MMR) vaccine or had measles disease. Reason: vaccine can protect.
  • You think your child needs to be seen, but the problem is not urgent

Contact Doctor During Office Hours

  • Measles exposure, never received measles (MMR) vaccine or had measles disease and NO symptoms. Reason: vaccine is needed
  • Widespread local community outbreak of measles, child 6 - 11 months old, but NO known exposure yet. Reason: high risk age and vaccine could protect.
  • You have other questions or concerns

Self Care at Home

  • Exposed to measles over 21 days ago and NO measles symptoms. Reason: no longer at risk for infection.
  • Measles exposure, but has already received measles (MMR) vaccine or had measles disease, and NO symptoms
  • Measles exposure (close contact) – how to protect others

Care Advice for Measles Exposure

Treatment for Close Contacts Without Symptoms

What You Should Know About Measles Exposure:

  • Your child has been exposed to the measles virus.
  • What you need to do depends on if your child has had measles vaccines or infection before.
  • Keeping your child's vaccines up-to-date always gives your child the best protection.
  • In any case, try to avoid further exposure to people with measles.
  • Here is some care advice that should help.

If No Prior Measles Vaccines or Infection, You Need the Vaccine for Protection

  • Your child has a high risk of getting measles in the next 10 to 12 days.
  • For protection from this infection, your child needs a measles vaccine as soon as possible. Call for a vaccine appointment now.
  • The vaccine is 90% protective if given within 3 days of exposure.
  • After 3 days of exposure, the vaccine is not helpful in preventing the disease from this specific exposure.

If Had Only One Measles Vaccine, You Need a Booster Vaccine

  • One measles (MMR) vaccine gives 95% of children protection against measles.
  • If that is the case, get a MMR vaccine booster as soon as possible.
  • Call now for a vaccine appointment.

If Had Measles Vaccine Twice in the Past, You Should be Protected

  • Since your child's measles (MMR) vaccines are up-to-date, your child is 99% protected against getting measles.
  • That means they have less than a 1% chance of getting measles.
  • If that happens, the symptoms would be much milder than regular measles.
  • You do not need to see your doctor.

If Had Measles Infection in the Past, You Should be Protected

  • Since you are certain that your child has had measles before, that means they are immune to measles.
  • Protection is lifelong.
  • Children do not get measles a second time.
  • You do not need to see your doctor.

If You are Not Vaccinated, Isolation is Needed for Known Measles Exposures:

  • Measles is extremely contagious.
  • If your child is unvaccinated, Isolate your child at home until 21 days has passed since the exposure.
  • DO NOT allow any visitors.
  • DO NOT send your child to school, childcare, or other public places.
  • Avoid close contact with others (hugging, kissing).
  • If you go to an ER or other medical facility, stay in the car until medical staff brings you a mask and escorts you in.
  • Because measles is so contagious, someone from the public health department may also contact you.

Call Your Doctor If:

  • Fever occurs
  • Rash occurs
  • Other symptoms of measles occur (such as cough)
  • You think your child needs to be seen
  • You have other questions or concerns

Copyright 2000-2026 Schmitt Pediatric Guidelines LLC. Date Updated: Dec 02 2025 00:00 Version 0.1

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