The CDC will change the guidance on masks based on “data and science,” White House Press Secretary Jen Psaki said on Tuesday, despite some states changing their guidance and even a teachers union asking for the White House to weigh in on the issue.

“When are we going to hear from the CDC on this guidance? California yesterday changed their guidance. Randi Weingarten — teachers union — is vocally asking for the White House and the CDC to weigh in. So when are we going to hear from the CDC about updating the guidance on masks?” Fox News White House Correspondent Jacqui Heinrich asked.

“You’ll have to ask the CDC. The CDC moves at the pace of data and science. I would note that our goal remains continuing to ensure that there is guidance that helps school districts stay open. That’s our goal. We want kids to be in school. Ninety-eight percent of schools are open. That’s a very good sign,” Psaki said.