A growing number of health officials and scientists are calling on the Centers for Disease Control and Prevention (CDC) to release data behind its decision to recommend that COVID-19 vaccinated people wear masks in high-transmission areas. One of them, New York City Health and Hospitals President and CEO Mitchell Katz, said he’s reluctant to follow the agency’s guidelines on universal masking. “While the CDC issued their guidance yesterday at about 3 p.m., they have not yet released their scientific reports on the data that underlies their recommendation,” Katz said at a news conference. “I think we owe it to New Yorkers to very carefully, as you say, review that information and understand its implications,” Katz added. “Our focus has to be on getting people vaccinated.” During the news conference, New York City Mayor Bill de Blasio, in a news conference with Katz, suggested that he will delay action around mask-wearing until the …