If you have respiratory symptoms, you may be wondering if you have a cold, flu, or covid-19. On top of that, there's another question to consider. How does pneumonia fit into this? When you have an infection that makes the alveoli or air sacs in your lungs fill with fluid or pus, that’s pneumonia. In addition to other causes, colds, flus, and covid-19 can each lead to … [Read more...] about A Quick Guide to Pneumonia