Should certain individuals be monitoring themselves carefully for early self-detection for COVID-19?
Often people who have pulse oximeters or supplemental oxygen are the ones who have already been developing chronic lung or heart conditions prior to the COVID-19 pandemic, and they need to be aware that symptoms need to be recognized earlier than the pulse oximeter tells them there is a problem. This is a population where early diagnosis is important.
Beyond that, individuals who may be otherwise immunocompromised because of other immunologic diseases or because of medications they are on that have compromised their immune system should have a heightened awareness that they may get complications of the disease. They need to be particularly cautious about the usual washing of the hands, not touching the face, avoiding sick individuals, and employing social distancing.