The Delta variant of COVID-19 is upending our summer, as the CDC just announced even vaccinated people should wear a mask indoors, when in communities with high transmissibility. Dr. Anthony Fauci , the chief medical advisor to the President and the director of the National Institute of Allergy and Infectious Diseases, appeared on Morning Joe to sound the alarm, and shared what you can do to stay safe, and keep any unvaccinated kids safe. Read on for five life-saving pieces of advice—and to ensure your health and the health of others, don't miss these Sure Signs You Have "Long" COVID and May Not Even Know It . 1 Dr. Fauci Warns That the Virus Has Changed Two months ago, "the CDC came out with the recommendation that individuals who have been vaccinated do not need to wear masks, indoors, or outdoors," admitted Fauci, but "something has changed. And what has changed is the virus . The CDC hasn't changed and the CDC hasn't really flip-