You brought up the oximeter on a thread about people who are now getting out of quarantine either because you are unaware that the world is no longer in 2020 and the lung capacity is not a current covid related issue* , or you just don’t want to let go of the death and despair cloud you keep perpetuating. Whichever it is, please stop correcting others who actually have current information.
*(per my physician, nurse, physician friend, two nurses working in covid units and one or two reliable physicians who public articles online).