The Basics
What Causes Measles?
Measles is a highly infectious viral disease caused by the measles virus. It spreads with incredible ease through respiratory droplets (coughing and sneezing) and can linger in the air for up to two hours. Because it is so contagious, a single infected person can infect up to 90% of the unprotected people around them. While often thought of as a childhood rash, it can lead to serious complications such as pneumonia, ear infections, and brain inflammation (encephalitis).
Vaccination Overview
The Combined MMR Vaccine
In modern healthcare, the vaccine for Measles is administered as a 3-in-1 combination known as the MMR vaccine, which provides simultaneous protection against Measles, Mumps, and Rubella.
| Feature | Details |
| The Combination | Protects against Measles, Mumps, and Rubella in a single injection. |
| Number of Doses | A full course consists of two doses. |
| Standard Schedule | Typically given at 12 months and again at 3 years and 4 months. |
| Travel/Catch-up | Adults and older children who missed their doses can be vaccinated at any time, with at least one month between doses. |
| How it is given | Administered as a single injection into the upper arm or thigh. |
| Suitable Age | Usually from 1 year of age. (Can be given from 6 months in specific travel or outbreak scenarios). |
Safety & Side Effects
What to Expect After the MMR Shot
The MMR vaccine is a “live” vaccine, meaning it contains a highly weakened version of the viruses. Because of this, side effects can appear in “waves” as the body develops immunity to each component:
Immediate (1–2 days): Soreness or redness at the injection site.
The “Measles” Phase (6–11 days): Some people develop a mild, non-infectious rash and a slight fever.
The “Mumps” Phase (Approx. 3 weeks): Very rarely, some people experience mild swelling of the glands in the cheeks or neck.
Duration: These symptoms are mild and usually last only 2–3 days.
Recognising Symptoms
Symptoms of Measles Infection
Symptoms start roughly 10 days after infection. The characteristic rash follows a few days later.
The “3 Cs”: Cough, Coryza (runny nose), and Conjunctivitis (red, watery eyes).
Koplik Spots: Small white spots (like tiny grains of salt) appearing inside the cheeks.
High Fever: A temperature that can reach 40°C (104°F).
The Rash: A red-brown blotchy rash that starts on the face and behind the ears before spreading down the body.
Additional Precautions
Protecting the Community
Check Your Records: If you are unsure if you had two doses of the MMR, it is safe to have a “catch-up” dose.
Travel Awareness: Measles outbreaks occur globally. Check if your destination has a current outbreak before you fly.
Pregnancy: The MMR vaccine should be given before or after pregnancy, not during, as it is a live vaccine.
High Contagion: If you suspect you have measles, do not go directly to a GP waiting room. Call ahead so they can provide a safe way for you to be seen without infecting others.
FAQ
Can I get just the Measles vaccine on its own?
Single measles vaccines are not recommended or widely available. The combined MMR is the safest and most effective way to ensure protection against three serious diseases with a single needle.
Do I need a booster if I had the vaccine in the 1970s or 80s?
Some people who were vaccinated decades ago only received one dose. To be fully protected for travel or during an outbreak, it is highly recommended to ensure you have had a total of two doses in your lifetime.
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. While we strive to provide accurate health information, it is not a substitute for the professional judgment of a healthcare provider. Always seek the advice of your physician or other qualified health professional with any questions you may have regarding a medical condition or vaccination schedule. Never disregard professional medical advice or delay seeking it because of something you have read on this website.