COVID-19 updates: More than 10,000 new deaths reported in US in 1 week

In New York state, masks are now required at child care centers for children ages 2 and above and for all staff and visitors, Gov. Kathy Hochul said in a tweet Wednesday.

"These universal mask requirements apply to anyone medically able to tolerate wearing a mask, regardless of vaccination status," the governor said.

"With Delta on the rise, requiring masks is a key part of slowing the spread, reopening our economy safely, and protecting vulnerable New Yorkers," Hochul tweeted. "This new mask requirement ensures that children in our child care facilities receive the same protection as children in our schools."

Talk show host Wendy Williams has a breakthrough COVID-19 case, her show said.

The new season of "The Wendy Williams Show" will be postponed to Oct. 4.

New data from Pfizer show that Americans will likely need a booster shot about six months after their second vaccine dose.

Pfizer said the vaccine's protection against infection is waning over time. The company, however, said it didn't find significant evidence that the delta variant was contributing, more that it would've happened over time regardless.

Pfizer also heavily leaned on data from Israel to show that the vaccine's protection against severe COVID-19 could start to erode in the U.S. as it has there. So far, vaccine efficacy against hospitalization in the U.S. has held up, according to CDC data.

The data was released by the FDA ahead of a meeting where it will be reviewed by independent advisers. If the advisory committee supports boosters, the FDA would then formally amend its vaccine approval for Pfizer. The decision will be sent to the CDC's Advisory Committee on Immunization Practices and finally to the CDC for sign off.

-ABC News' Cheyenne Haslett

TSA agents screened 1,271,516 travelers at U.S. airports Tuesday, the lowest number since May 5.

-ABC News' Sam Sweeney