@ABScientist COVID is quite common without symptoms or issues. I have had it 8 times now because I worked as a scientist with patients so I was tested often. Of the 8 times i had it I presented no symptoms of any kind 7 out of those 8 times.
Only reason they are showing up positive is because its just so common to present asymptomatically. In fact you are probably around hundreds of people in a day who would test positive but have no symptoms.