Given the task definition and input, reply with output. Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.

Paragraph: A spokesman for California State University, Los Angeles, said Saturday that 106 staff members and 550 students have been told to stay at home and avoid contact with others. Thirty students and employees from the University of California, Los Angeles, remain quarantined. Those under quarantine were possibly exposed to a person with measles on each campus earlier this month. Many people have been cleared after proving their immunity with medical records or tests. The quarantines mark one of the most sweeping efforts by health officials to contain the nation's measles outbreak, where cases have reached a 25-year high . Claim: Nearly 700 from LA universities still in measles quarantine.
Nearly 700 people possibly exposed to measles at two Los Angeles universities are still quarantined three days after health officials ordered the precautions to contain the spread of the highly contagious disease.