Measles is caused by viruses and appears around the world. It is highly contiguous. A measles infection is not a harmless disease: about one in 10 patients will suffer complications. In Germany, vaccinations have ensured that measles infections are now much less common. Nevertheless, there are repeated frequent cases among unprotected persons. Since increasing numbers of cases affect teens and young adults, it can no longer be called a “children’s” disease. To extinguish measles in Germany, more persons in these age groups must be vaccinated.
Measles viruses can spread only by person-to-person contact. Almost every contact between an unprotected person and someone with measles leads to infection – even over a distance of several metres. Coughing, sneezing or talking produces small drops of infected saliva: these airborne pathogens can spread further and then be inhaled.
At first, patients suffer from high fever, coughing and a runny nose, as well as inflammation of the nose or throat and conjunctivitis. The characteristic skin rash only forms after a few days – starting in the face and behind the ears before spreading over the patient’s entire body. The skin rash is accompanied by another high fever and clears up after 3 to 4 days. Skin may also flake off during this process.
Measles temporarily weakens the immune system, making it more difficult to fight off other diseases. This means that complications can occur that are often caused by other pathogens: these include middle ear infections, bronchitis or pneumonitis. One particularly fearsome complication from measles is encephalitis: occurring in about 1 out of every 1,000 cases, 10% to 20% of the patients affected die from this. 20% to 30% suffer severe after-effects such as mental disability or paralysis.
Very rarely, a condition known as SSPE (subacute sclerosing panencephalitis) can occur several years after a patient has recovered from measles. SSPE is a progressive inflammation of the brain and nervous system, and is always fatal. Children who caught measles before the age of 12 months are particularly at risk.
The first symptoms occur roughly 8 to 10 days after being infected. It usually takes about 2 weeks before the typical skin rash appears. People with measles are contagious for about 3 to 5 days before the rash can be seen. Once the skin rash is visible, you stay contagious for 4 more days. Anyone having recovered from measles is protected against reinfection for the rest of their life.
Anyone who has not been infected before or does not have sufficient protection from complete vaccination may contract measles. Babies who are too young to be vaccinated are especially at risk, as are young people and young adults who missed one or both vaccinations during childhood. People with immune deficiencies, who cannot be vaccinated against measles themselves, infants and adults also run a higher risk of suffering complications if they contract the disease.
The German Permanent Vaccination Commission (STIKO) recommends vaccination against measles: Preferably, it should take place using the MMR combination vaccine that protects from mumps and rubella as well.
Those who had contact with measles patients and are not protected should receive the MMR vaccination as "stop-gap" vaccinations within 3 days if possible. Babies aged 9 months and over can also be vaccinated if they are at risk of infection. In some cases, this can actually prevent the disease from developing or weaken it. For contact persons who cannot be given the MMR vaccine (e.g. babies less than 6 months old or pregnant women), STIKO recommends using the option of antibodies (immunoglobulins) as a temporary prophylactic against infection. Contact persons of measles patients who are not fully vaccinated or have gone through the illness must not attend community facilities according to the German Prevention of Infection Act. Health authorities can, at their discretion, exclude unvaccinated persons from community facilities. Such facilities can be visited only once.
Your local health authority can provide you with further advice. Since measles infections must be reported, they will also have the latest information and be very experienced in dealing with the disease.
More (specialist) information is also available online from the Robert Koch Institute (www.rki.de/masern).
For more information about how vaccinations stop infection, visit the website set up by the Federal Centre for Health Education (www.impfen-info.de).