COVID-19’s preferred habitat is the respiratory tract, where it is most life-threatening in the lungs.  Infected lungs can become so congested that breathing becomes impossible without the help of a ventilator, and even using a ventilator hasn’t been enough in some cases to prevent death. So now is a good time to give your lungs some special care and consideration.  If you already have lung problems, such as asthma or chronic obstructive pulmonary disease, you’re more apt to get serious complications like pneumonia from COVID-19.  And whether or not you have existing lung problems, air pollution exposure increases your risk.  According to Dr. Meredith McCormack, a spokeswoman for the American Lung Association and associate professor of pulmonary and critical care at Johns Hopkins University, recently quoted in the New York Times , “Increased pollution increases susceptibility to infection. . . . All things being equal, a person exposed to a…