News of a measles outbreak is worrying when your baby is not yet old enough for the MMR (measles, mumps, rubella) vaccine. This article follows CDC guidance in the United States on how to protect infants, what symptoms to watch for, and when to call ahead.
Why It Happens
Measles is caused by a virus that spreads through the air and through respiratory droplets from coughing and sneezing, and it is among the most contagious infections known. Babies younger than 12 months are generally not yet vaccinated, so their protection depends largely on the immunity of people around them. Public health sources report that one dose of MMR is about 93% effective and two doses about 97%, which is why keeping family members and close contacts up to date matters.
How It Differs by Age and Stage
The CDC lists children under 5 among the groups at highest risk of serious complications. It reports that about 1 in 20 children with measles develops pneumonia, which is the most common cause of measles death in young children, and about 1 in 1,000 people develops brain swelling (encephalitis). Ear infections and diarrhea are common. Illness starts with high fever, cough, runny nose and red eyes; tiny white spots may appear inside the mouth, and then a rash begins on the face and spreads downward. CDC materials describe the rash appearing about 2-5 days after the first symptoms and lasting around 5-6 days, with fever often spiking above 104 F when it appears.
What to Do at Home
For infants 6-11 months who will travel internationally, the CDC recommends one dose of MMR before departure, ideally at least two weeks ahead. This early dose does not replace the routine series: the child still needs two more doses, starting at 12-15 months, and after the first birthday two doses given at least 28 days apart are advised. Babies under 6 months cannot receive the vaccine, so postponing travel to outbreak areas is the safer choice. At home, check that every adult and older sibling has documented MMR doses and ask a clinician about any gaps. Wash hands often, keep rooms ventilated, and limit contact with anyone who has fever and cough. Schedule the first routine dose as soon as your baby is eligible.
Common Misunderstandings
Some people think measles is gone, but travel-related cases and outbreaks continue to occur. Another idea is that an early dose at 6-11 months counts as one of the routine two; it does not. Parents may also confuse measles with a simple viral rash such as roseola. In measles, cough, red eyes and high fever usually come first, with the rash following.
When to Seek Care
If your baby has fever with cough, runny nose, red eyes or a spreading rash, and especially after travel or contact with a case, call the doctor’s office before arriving so staff can keep your child away from other infants in the waiting room. Go to the emergency room right away if breathing is difficult, lips look blue, there is a seizure, the baby is very drowsy or limp, cannot feed, or has far fewer wet diapers. This information is based on CDC guidance for the United States; if you live in another country, check with a local pediatrician. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.