Is it clinically necessary to provide supplemental oxygen to patients with mild, asymptomatic hypoxemia only during activity while they are recovering from an acute respiratory illness?  

My practice is to withhold supplemental oxygen in patients with mild, asymptomatic hypoxemia during exertion when the underlying condition is expected to improve. I am not aware of strong evidence supporting the benefit in these cases, and I believe the potential harms generally outweigh any theoret...