As COVID-19 cases increase in some parts of the country, the general public is increasingly concerned about the virus and the possible role HVAC systems may play in disease transmission. on June 29, Harvard Medical School infectious disease specialist Edward Nardell stated quite the opposite. Nardell said air conditioning systems might indeed contribute to the virus spread. “The states that, in June, are already using a lot of air conditioning because of high temperatures are also the places where there’s been greater increases in the spread of COVID-19, suggesting more time indoors as temperatures rise.”