By Adam KempStaff writerakemp@oklahoman.comDr. Douglas Drevets, an infectious diseases specialist at the University of Oklahoma Health Sciences Center, held a public question and answer session on Tuesday afternoon to answer questions about COVID-19, how it affects the lungs, how hospitals are planning for a surge of patients and why social distancing can work. What are the big concerns for people with existing respiratory conditions? We do have particular concern for people who already have lung disease, things like asthma or COPD or even people who are smokers and vapers.Read more on NewsOK.com