Like others, I suspect a sizable number of people have contracted and recovered from the virus never knowing they had contracted COVID-19. (Particularly early on in the pandemic.)
I have a family member in another state that is recovering at home. (He is a nurse and contracted COVID-19 at work.) I spoke with him and compared his symptoms with the symptoms I manifested a month ago which were sore throat, light cough, chills, fever and fatigue. Almost an exact match. The antibody test should come on line in a month or two and I suspect the data generated over time will be very revealing. No matter, the next few weeks are going to be very challenging for our nation. However, as we always have, we will endure because that is who we are.