The U.S. Centers for Disease Control and Prevention said on Thursday that it will no longer recommend schools or daycares quarantine students or run test-to-stay programs if students are exposed to COVID-19.

The agency also said it is no longer recommending unvaccinated people quarantine after exposure, saying around 95% of the U.S. population has either been vaccinated or had COVID-19 already, or both.

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CDC headquarters with logo to the right and the building behind it to the left

CDC headquarters in Atlanta, Georgia on Sept. 30, 2014. (REUTERS/Tami Chappell/File Photo)

"Prior infection and vaccination confer some protection against severe illness, and so it really makes the most sense to not differentiate with our guidance or our recommendations based on vaccination status at this time," CDC scientist Dr. Greta Massetti said in a media briefing.

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Pfizer COVID-19 vaccine bottle in someone's hand

Dr. Manjul Shukla transfers Pfizer COVID-19 vaccine into a syringe, Thursday, Dec. 2, 2021, at a mobile vaccination clinic in Worcester, Mass. (AP Photo/Steven Senne)

The CDC's school guidance also removed recommendations to keep children in cohorts in order to reduce the likelihoood of COVID-19 exposure.

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Students with masks in a classroom with a parent wearing an N-95 behind them

Marisela Maddox, a parent of students Atlas and Hero Smookler, works as a substitute teacher at the Austin Jewish Academy as the spread of the Omicron variant leads to teacher shortages amid the coronavirus disease (COVID-19) pandemic in Austin, Texas, U.S., January 20, 2022.  (REUTERS/Callaghan O'Hare)

The agency said students who are exposed to COVID-19 should follow CDC recommendations to wear a high quality mask for 10 days and test on day 5.

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