Chicago Public Schools has been in talks with teachers over COVID-19 safety.
As the COVID-19 pandemic has swept the globe, more than 5.4 million people have died from the disease worldwide, including over 837,000 Americans, according to real-time data compiled by Johns Hopkins University's Center for Systems Science and Engineering.
About 62.5% of the population in the United States is fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
The Transportation Security Administration reported 3,037 current COVID-19 infections on Wednesday.
The agency's infections have increased by about 16% in two days, according to TSA data.
The agency, which employs about 60,000, said it's had a cumulative 15,191 COVID-19 cases. The agency said 12,154 employees have recovered and 33 have died.
ABC News' Sam Sweeney
The director of the Centers for Disease Control and Prevention has given the final go-ahead for children ages 12 to 15 to get Pfizer's COVID-19 booster.
"It is critical that we protect our children and teens from COVID-19 infection and the complications of severe disease," CDC Director Rochelle Walensky said in a statement endorsing the CDC advisory panel's recommendation to expand booster eligibility.
The CDC recommends that adolescents between the ages of 12 and 17 get a Pfizer booster five months after their second dose.
-ABC News' Cheyenne Haslett
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."
