Short answer: yes, measles can kill you, although most people who get it recover with no lasting effects. UChicago Medicine puts the death rate at three in 1,000 people who contract measles, and says you cannot predict in advance who will become seriously ill. Below, the Research Team explains how the infection turns deadly, who faces the highest risk, and what is still unknown.
How likely is it that measles kills you?
Death is uncommon, but it is not rare enough to dismiss. UChicago Medicine on measles danger says that for most people measles is not life-threatening, but that three in 1,000 people who contract it will die. The NFID measles FAQ gives a similar range, estimating that 1 to 3 out of 1,000 children with measles will die.
Hospitalized patients face a higher risk. A 2020 US measles hospitalization study analyzed national hospital records from 2002 to 2016 and found inpatient mortality of 3.3% (34 deaths) among measles patients. The authors noted that hospitalized patients likely had more severe measles with complications.
How does measles lead to pneumonia, brain swelling and death?
The virus starts in the airways. Stanford Medicine’s measles explainer quotes an infectious disease specialist: “Measles works by invading the respiratory tract, where it infects local lymph nodes before eventually spreading to the rest of the body.” That is why measles tends to affect the lungs, the brain and other parts of the central nervous system. The same explainer notes that measles also suppresses the immune system, which can leave children open to other infections.
Johns Hopkins Medicine measles overview lists the serious complications: pneumonia (infection of the lungs), encephalitis (infection of the brain), and death in severe cases. It also notes that up to 30% of children with measles will have a complication, ranging from mild to severe. The figures for the most serious ones look like this:
| Complication | What it is | What the figures say | Source |
|---|---|---|---|
| Pneumonia | Infection of the lungs | About 6% of healthy children; “1 in 20” in the NFID FAQ | Stanford Medicine; NFID |
| Encephalitis | Inflammation or swelling of the brain | Can cause permanent brain damage in one of every 1,000 cases | UChicago Medicine |
| Death from neurologic or respiratory complications | Death caused by brain or lung complications | One to three of every 1,000 cases in the US | UChicago Medicine |
| Post-measles encephalomyelitis | A brain complication that can follow infection | Can occur in 1 per 1,000 cases | 2020 US measles hospitalization study |
| Subacute sclerosing panencephalitis (SSPE) | A rare, degenerative and fatal disease of the central nervous system | Can appear seven to 11 years after infection, most often in children infected before age 2 | UChicago Medicine |
Most deaths from measles are from complications of the disease, not the rash itself. Those complications include pneumonia, encephalitis, and severe diarrhea with dehydration (WHO; Johns Hopkins Medicine). That is why the warning signs later in this guide matter.
Who faces the highest risk?
Complications are most likely in the very young and the old, along with pregnant women and people with weakened immune systems, such as people living with HIV (Stanford Medicine’s measles explainer). The NFID FAQ names unvaccinated people, infants too young to be vaccinated, immunosuppressed people and pregnant women as the most at risk.
The 2020 study lists earlier research showing that risk factors for severe illness include age under 5, adults over 20, immunodeficiency, pregnancy, malnutrition, crowding and vitamin A deficiency. Hopkins notes that a person who does not have enough vitamin A may need extra vitamin A, and that taking it during measles can lower the risk of serious complications and death. Ask a clinician about vitamin A if this applies to you. Do not start a dose on your own.
If you are asking about a baby, the NFID FAQ says infants get some protection from antibodies their mother passed on, but that protection wanes quickly, so infants aged 6 to 11 months have little protection. Hopkins says children aged 6 to 12 months can receive an MMR dose if they are at risk, and that parents should discuss this with their pediatrician. The pediatrician is the right person to set the timing.
Can measles kill you if you are vaccinated, or if you had it before?
Vaccination lowers the risk the most. UChicago Medicine says more than 97% of people who receive two doses of the MMR vaccine develop immunity. It adds that catching measles after two doses is possible but very uncommon. Stanford Medicine says that a two-dose schedule offers almost complete protection. One dose gives immunity in about 93 to 95% of people, which is why two doses are now the standard.
Having had measles also protects you. Hopkins states that “children who have had measles are immune for life.” Adults who are presumed immune include people born in the US before 1957, according to Stanford Medicine and the NFID FAQ.
Not everyone born before 1970 is immune. Stanford Medicine notes that people immunized between 1963 and 1967 may have received a less effective early version of the vaccine, and that people born between the late 1960s and late 1980s likely received only one shot. If you are not sure of your status, ask your doctor whether a booster is recommended. You can also read the Pennsylvania measles outbreak deaths and vaccine guide for the outbreak context.
Why is measles so dangerous in the first place?
Measles spreads more easily than most respiratory viruses. Hopkins says someone with measles can infect up to 90% of the people they come into close contact with if those people lack immunity. Stanford Medicine explains that the virus travels in tiny droplets that stay in the air, so “if you walk into a room two hours after an infected person was in it, you can still get the virus.” The NFID FAQ calls measles “the most contagious virus known to humans.”
Why is measles coming back?
UChicago Medicine links the rise in cases to misinformation about vaccines and to lower vaccination rates in some communities. Stanford Medicine says the US measles immunity rate has fallen to about 92 to 93%, below the 95% a community needs to stop the virus from spreading. Kindergarten coverage was 92.7% in 2023-24. UChicago reports more than 3,200 new cases in the US as of mid-September 2026, compared with 2,289 for all of 2025 and 285 in 2024. For local context, see the Pennsylvania measles outbreak safety guide.
Before vaccines, the toll was much higher. Stanford Medicine states that before vaccines were introduced in the 1960s, nearly everyone contracted measles as a child, and major epidemics could cause up to 2.6 million deaths per year globally. In 2023 that number fell to 107,000 deaths, and Stanford cites WHO estimates that vaccination helped avert 60 million deaths between 2000 and 2023.
Has anyone died from measles recently?
UChicago Medicine reported four measles-related deaths in the US as of mid-September 2026. Your state health department will have the most current count.
Can measles be cured?
As of November 2026, the NFID FAQ says there is currently no antiviral medication to treat measles. Medical care aims to relieve symptoms and address complications, such as bacterial infections. Hopkins adds that antibiotics do not work against viral infections like measles, but doctors may use them for complications such as bacterial infections that develop.
What is still unknown?
The true US death toll is hard to pin down. The 2020 study notes that reporting systems are limited, and that these limitations “may result in underestimates of the true mortality of measles in the US.” Death rates also differ by place. Stanford Medicine says that in low-income countries, where children have poorer nutrition and limited care, the death rate “can be very high — 4-10%.” Your local count may change week to week, so check it before you assume a number is final.
When should you get emergency care?
Hopkins advises calling your healthcare provider right away if you suspect measles, and notifying the clinic in advance before you arrive, because measles is very contagious. Get emergency care if you or your child have a fever higher than 105 degrees Fahrenheit (40.5 degrees Celsius), trouble breathing, a severe headache, or confusion or clumsiness.
Before you act
- If you think you or your child has measles, call your provider before going in.
- Check your vaccination record. UChicago lists the adult criteria for immunity, including documented MMR doses, lab evidence of immunity, and birth before 1957.
- Ask a pediatrician about timing for a baby or young child.
- For the newest local numbers, check your state health department.
