Infection not likely
A person with no shortness of breath, cough
, phlegm, or chest x-ray abnormalities should not have any chronic lung infection.
If he just inhaled infectious germs, he may get symptoms (of acute infection, not chronic) a few days or weeks later. If a person "feels" there is something unusual in his chest, despite no infection symptoms, he should be evaluated by a primary care doctor or lung doctor.