Consistent with CDC guidelines, she is isolating at home and will participate in her planned meetings virtually.

The CDC's director, Dr. Rochelle Walensky, told the agency's staff about the changes on Wednesday.

All Americans age 5 and over should get a booster five months after their initial primary series, according to the CDC. 

A final signoff from the Centers for Disease Control and Prevention is expected this weekend.

Some experts are worried the country now is seeing signs of a sixth wave, driven by an omicron subvariant.

The agency is still advising that people, including schoolchildren, wear masks where the risk of COVID-19 is high.

With the omicron variant waning, government and business leaders have been out ahead of the CDC in ending virus measures.

It's possible other states will seek to shorten their isolation and quarantine policies, and CDC is trying to get out ahead of the shift.

Nearly 200 million Americans are fully vaccinated.

The U.S. is opening COVID-19 vaccine boosters to all adults, and urging them for anyone 50 and older.