The Latest on measles quarantines at two Los Angeles universities (all times local):

7:25 a.m.

The quarantine order for students and staff who may have been exposed to measles at two Los Angeles universities requires them to remain at home until they provide evidence of immunity or the risk period expires.

FILE - In this Feb. 6, 2015, file photo, a flyer educating parents about measles is displayed on a bulletin board at a pediatrics clinic in Greenbrae, Calif. (AP Photo/Eric Risberg, File)
FILE – In this Feb. 6, 2015, file photo, a flyer educating parents about measles is displayed on a bulletin board at a pediatrics clinic in Greenbrae, Calif. (AP Photo/Eric Risberg, File)

The order issued this week initially covered more than 200 people at the University of California, Los Angeles, and Cal State Los Angeles, but dozens have already been released.

According to the Los Angeles County Department of Public Health, those under quarantine should have no contact with others who have not been screened for immunity.

The quarantine for measles can be up to 21 days from the last exposure.

FILE - In this Jan. 29, 2015, file photo, pediatrician Charles Goodman vaccinates 1-year-old Cameron Fierro with the measles-mumps-rubella vaccine, or MMR vaccine, at his practice in Northridge, Calif. (AP Photo/Damian Dovarganes,File)
FILE – In this Jan. 29, 2015, file photo, pediatrician Charles Goodman vaccinates 1-year-old Cameron Fierro with the measles-mumps-rubella vaccine, or MMR vaccine, at his practice in Northridge, Calif. (AP Photo/Damian Dovarganes,File)

The potential exposure at UCLA occurred at two buildings on April 2, 4 and 9. The exposure at Cal State LA occurred in a library on April 11.

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10:30 p.m.

FILE - This Feb. 26, 2015 file photo shows students on the University of California, Los Angeles campus. (AP Photo/Damian Dovarganes, File)
FILE – This Feb. 26, 2015 file photo shows students on the University of California, Los Angeles campus. (AP Photo/Damian Dovarganes, File)

A quarantine has been issued for students and staff at two Los Angeles universities who may have been exposed to measles and either have not been vaccinated or can’t verify that they have immunity.

Health authorities said Thursday that the order in connection with the University of California and Cal State University requires that affected people stay home, avoid contact with others and notify authorities if they develop measles symptoms.

More than 200 people were initially affected but officials expected that number to drop as they proved immunity.

FILE - This Feb. 6, 2015, file photo shows a Measles, Mumps and Rubella, M-M-R vaccine on a countertop at a pediatrics clinic in Greenbrae, Calif. (AP Photo/Eric Risberg, File)
FILE – This Feb. 6, 2015, file photo shows a Measles, Mumps and Rubella, M-M-R vaccine on a countertop at a pediatrics clinic in Greenbrae, Calif. (AP Photo/Eric Risberg, File)

The order comes as the number of measles cases nationwide has hit a 25-year high. A small outbreak of measles in Los Angeles County involving five confirmed cases is linked to overseas travel.

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The Cal State University, Los Angeles Student Union building is seen in Los Angeles Thursday, April 25, 2019. (AP Photo/Damian Dovarganes)
The Cal State University, Los Angeles Student Union building is seen in Los Angeles Thursday, April 25, 2019. (AP Photo/Damian Dovarganes)
Students walk past the Harriet and Charles Luckman Fine Arts Complex at the The Cal State University, Los Angeles campus Thursday, April 25, 2019. (AP Photo/Damian Dovarganes)
Students walk past the Harriet and Charles Luckman Fine Arts Complex at the The Cal State University, Los Angeles campus Thursday, April 25, 2019. (AP Photo/Damian Dovarganes)
Students walk past Royce Hall at the University of California, Los Angeles Thursday, April 25, 2019, in the Westwood section of Los Angeles. (AP Photo/Jae C. Hong)
Students walk past Royce Hall at the University of California, Los Angeles Thursday, April 25, 2019, in the Westwood section of Los Angeles. (AP Photo/Jae C. Hong)
Students sit on the lawn near Royce Hall at UCLA Thursday, April 25, 2019, in the Westwood section of Los Angeles. (AP Photo/Jae C. Hong)
Students sit on the lawn near Royce Hall at UCLA Thursday, April 25, 2019, in the Westwood section of Los Angeles. (AP Photo/Jae C. Hong)
Hundreds of students and staff at two Los Angeles universities have been placed under quarantine because they may have been exposed to measles and either have not been vaccinated or cannot verify that they are immune, officials said Thursday. (April 25)
Hundreds of students and staff at two Los Angeles universities have been placed under quarantine because they may have been exposed to measles and either have not been vaccinated or cannot verify that they are immune, officials said Thursday. (April 25)

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