National Institute of Allergy and Infectious Diseases head Anthony Fauci said that the Centers for Disease Control and Prevention “didn’t flip flop” by issuing new masking guidelines for schools and certain high transmission areas. The reason for the change in guidance, he said in an MSNBC interview Tuesday, is due to the so-called “Delta” COVID-19 strain. Federal health officials said the Delta variant now comprises most of the new COVID-19 cases in the United States. “Something has changed. And what has changed is the virus,” he said referring to the CCP (Chinese Communist Party) virus that causes COVID-19. “The CDC hasn’t changed, and the CDC hasn’t really flip-flopped at all. What’s happened is that when that earlier recommendation was made, we were dealing predominantly with the Alpha variant.” When asked about why masks are needed for vaccinated individuals, Fauci said it’s because of the nature of the Delta strain. “The …