Pus collecting between the pleural membrane layers is know as ?

Empyema

Explanation: Empyema is the medical term for pockets of pus that have collected inside a body cavity. They can form if a bacterial infection is left untreated, or if it fails to fully respond to treatment. The term empyema is most commonly used to refer to pus-filled pockets that develop in the pleural space.

exercising at a moderate intensity, and slowly increasing the duration.