COVID-19 cases have been reported on every cruise ship operating in U.S. waters with passengers, according to the U.S. Centers for Disease Control and Prevention.

More than 90 ships are currently being investigated by the CDC or have been investigated and are still being observed by the agency.

In order to meet the threshold for a CDC investigation, a ship must report COVID-19 cases in more than 0.10% of passengers or have a single crew member test positive in the previous seven days.

The only ships in U.S. waters that have not met this criteria, according to the CDC, only have crew members on board.

-ABC News' Mina Kaji

The Los Angeles County Department of Health updated its COVID-19 safety measures Wednesday and mandated that all of the county's businesses must provide N95 or KN95 masks to employees who work indoors.

"Well-fitting medical grade masks, and surgical masks," are also acceptable under the order.

"Everyone needs to be sensible about how to protect themselves and those they love by layering on protections whenever around non-household members," LA County's health director, Dr. Barbara Ferrer, said in a statement. "At work, this means upgrading your mask if you work indoors and you are in contact with other workers or members of the public."

The Centers for Disease Control and Prevention advisory panel voted Wednesday to approve COVID-19 boosters for 12- to 15-year-olds.

CDC Director Rochelle Walensky will likely to sign off on the move later Wednesday night.

MORE: CDC panel recommends Pfizer boosters for 12-15 year olds, final call expected from CDC director

Shots could go into arms as soon as Thursday morning. The Food and Drug Administration authorized the Pfizer boosters on Monday, paving the way for the CDC’s final green light.

-ABC News' Cheyenne Haslett

The 2022 Grammy Awards have been postponed due to the surge in COVID-19 cases linked to the omicron variant.

"After careful consideration and analysis with city and state officials, health and safety experts, the artist community and our many partners, thx have postponed the 64th Annual GRAMMY Awards Show," CBS and the Recording Academy said in a joint statement.

The statement continued, "The health and safety of those in our music community, the live audience, and the hundreds of people who work tirelessly to produce our show remains our top priority.  Given the uncertainty surrounding the Omicron variant, holding the show on January 31 simply contains too many risks."

A future date for the Grammys has yet to be announced.

The awards show was scheduled to be held at the Arena in Los Angeles and hosted by "The Daily Show's" Trevor Noah.

This is the second year in a row that the Grammys has been postponed. Last year, the show was held in March after its original date was canceled in January.

Mayo Clinic said it will lay off about 1% of its staff for failing to get at least one dose of the COVID-19 vaccine by a company deadline.

"While Mayo Clinic is saddened to lose valuable employees, we need to take all steps necessary to keep our patients, workforce, visitors and communities safe. If individuals released from employment choose to get vaccinated at a later date, the opportunity exists for them to apply and return to Mayo Clinic for future job openings," Mayo Clinic said in a statement to ABC.

Last October, Mayo Clinic had set a Jan. 3 deadline for all employees to get at least their first vaccine dose or face dismissal.

The health care organization said the number of staffers being let go was "comparable to what other health care organizations have experienced in implementing similar vaccine requirement programs."

Mayo Clinic employs about 73,000 people, according to its website.