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InformedHealth.org is the English-language version of the German website Gesundheitsinformation.de. By publishing this bilingual website, IQWiG fulfils part of its legal mandate to inform the general public about health issues. By offering a wide range of different topics, the website addresses both patients and (healthy) consumers.


Measles is caused by viruses and is very contagious – both in children and adults. The typical signs of measles are a light red rash and flu-like symptoms. A vaccine provides effective protection from measles and helps to prevent it from spreading to other people.

Scarlet fever

Doctors can usually diagnose scarlet fever quite easily based on the typical rash and a dark-red tongue, sometimes referred to as a “strawberry tongue.” Serious complications are very rare nowadays: Because scarlet fever is caused by bacteria, it can easily be treated with antibiotics.