It would have gone away except for the testing then saying those without systoms were real cases to jack up the numbers.
They basically Run your results through enough cycles (more than the recommended 30 CTs) until they find something, anything.
A sick person can be picked up after 7 CTs.
A recovered, & healthy not contagious individual will be marked positive (got covid) after 31 CTs.
An exposed healthy, not contagious individual will test positive for covid after 37 cycles.
*Corona is merely a name given to describe the configuration of the organism being spoken of. Our bodies are filled with many types of corona shaped organisms. The common cold is one type. The flu is another type. On and on it goes. So in truth everyone can test as positive for corona.