for both reasons of backwardness of the medical-hospital infection control profession and political influences of the AHA and corporate medicine. Their guidance’s list of the five key prevention strategies for K-12 schools, even with the 19 March 2021 update is still not consistent with the scientific evidence. It does not list ventilation, an effective engineering control, as the first key strategy. The general public knows airborne transmission is a reality and the importance of inhalation exposure to infectious aerosols has been extensively covered by CBS, MSNBC, NPR, the Washington Post, the New York Times, the Atlantic and many other mainstream media to the point that a Post journalist told me on March 19th that the topic wasn’t even considered newsworthy anymore. This lack of science-based guidance from CDC, focusing on surface cleaning and not air cleaning, severely complicates the situation for decision makers.