I contracted COVID in late November 2021. Headache, fever, fatigue, muscle aches, diarrhea, fever. Symptoms slowly subsided and began feeling better around Christmas. I returned to the gym as I did almost every day for the last fifteen years. I noticed my cardio fitness level had decreased and I expected that not being in the gym for a month. I noticed my cough returned but more frequent. I went to the doctor and after a chest x-ray, the radiologist noticed an infection in my lung. My doctor started me on an antibiotic and I'm feeling better. I also noticed my cardio fitness level is slowly improving. Thanks, Rob Krok