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Etymology 1 
- Rubeola, an acute highly contagious disease, (often of childhood) caused by a virus of genus Morbillivirus, featuring a spreading red skin rash, fever, runny nose, cough and red eyes
- Any of several other similar diseases, such as German measles.
Usage notes 
- Used with either singular or plural verb.
Derived terms 
acute highly contagious viral disease
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Etymology 2