Cal State Long Beach officials are urging all students and faculty to ensure their measles vaccinations are up to date after a severe outbreak in the region and country.

Two individuals affiliated with the local university were tested for the highly contagious illness, but the tests were negative, said spokesman Jeff Cook.

The city warned of possible measles exposure at Long Beach Airport on April 10, but so far there have been no confirmed cases in Long Beach.

Meanwhile nearly 700 people possibly exposed to measles at Cal State Los Angeles and UCLA have been quarantined as health officials ensure they have been vaccinated.

A spokesman for CSULA said Saturday that 106 staff members and 550 students have been told to stay at home and avoid contact with others.

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.

CSULB officials sent out an all-campus email on Friday strongly encouraging all students, faculty and staff to get immunized against the virus “for the safety and well-being of our campus community.”

Measles is a highly infectious disease transmitted by the airborne spread of respiratory droplets—often through coughing, sneezing or speaking.

If anyone suspects they have the illness, they should seek medical care immediately and not travel to campus or any other public place, officials said.

Associated Press contributed to this report.