I'm really worried about my husband. He was in a car accident and has a light chest injury, no bleeding, but we decided to do a CT scan just to be safe. The report says he has pulmonary nodules on his left lower lobe, one is 2 mm and the other is 4 mm. Could these nodules be a result of something serious? He did have COVID three years ago, could that be related in any way? I'm just trying to understand what this might mean.