This is true. My concern around this is that if long-Covid like symptoms are common with other respiratory illnesses, then how have we been missing them for so

This is true. My concern around this is that if long-Covid like symptoms are common with other respiratory illnesses, then how have we been missing them for so long? Honestly, one thing we might get out of Covid is a better understanding of some chronic illnesses that we currently don't treat well (like Chronic Fatigue Syndrome, for instance).