Measles - Diagnosis
Measles is fairly easy to diagnose because of its characteristic symptoms. The presence of Koplik's spots is often the most important clue. The appearance of a rash that travels from the head and neck out to the arms and legs is also an important indicator of a measles infection.
In case of doubt, a variety of laboratory tests can be performed. These tests are used to identify the presence of the measles virus in body fluids, such as urine and mucus.

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