The “mixed message” about wearing a mask at the beginning of the coronavirus pandemic has contributed to the reluctance of some Americans to wear a face covering now, Dr. Anthony Fauci told NPR in an interview Wednesday.

Americans were first told in February and March not to wear a face mask to protect against Covid-19 transmission as a shortage of personal protective gear for medical works worsened. But by May, health experts — including Fauci — reversed course and urged people to wear masks in public to prevent the virus from spreading.

“I think that did have an effect,” Fauci, head of the National Institute of Allergy and Infectious Diseases, told host Mary Louise Kelly.

Fauci admitted the early message to Americans about wearing a mask was “confusing.” Without elaborating, he said there were “many other things” now contributing to why people do not want to wear a face covering.

“We have to admit it that mixed message in the beginning, even though it was well meant, to allow masks to be available to help workers, that was detrimental in getting the message across right now. No doubt about it,” Fauci said.