@lilianna If it's a virus, yes. Nasal swab makes sense since it's flu season and also walking pneumonia is going around. If you have COVID for example, you'd possibly have a fever and need to simply wait it out or if caught early get on Paxlovid if you tested positive. Airway clearance could help it from turning into a chest infection etc or from developing a secondary infection.

If you're clearing clear sputum that's a good sign.