Noting that Corona virus is here to stay changes to Centers for Disease Control and Prevention (CDC) COVID-19 guidelines were announced on Thursday. The new guidelines are eased especially for schools and students and are universal - same for vaccinated u vaccinated.

The revised guidances end the recommendation of cohorting, that is children in different classrooms avoid mixing.

The guidelines are now the same for both fully vaccinated and unvaccinated individuals.
CDC says there is the high levels of population immunity from vaccination, prior COVID-19 infection, or both.
The new guidelines include a significant easing of social distancing and quarantine requirements.
The CDC also no longer recommends “test to stay” for schools that allow children to remain in class as long as they test negative after exposure to the virus.
Speaking to health line Dr. Theodore Strange, associate chair of medicine at Staten Island University Hospital in Staten Island, New York, told Healthline that we should use “common sense” regarding transmission risks.

Strange also advised we take precautions as the situation merits.

Because this virus has become less virulent as it has gone on in its progression and mutations, this virus is going to be living with us for a long time,” said Strange.

According to Strange, the coronavirus has moved from infecting the lower respiratory tract to the upper respiratory tract, where it causes a cold and sore throat.

“It’s the cold virus,” he said. “What we’re actually seeing is people with cold symptoms and flu symptoms.”

Read more from the article which put the changes in perspective

https://www.healthline.com/health-news/updated-cdc-covid-19-guidelines-no-more-social-distancing-quarantine-or-test-to-stay-for-schools