>>9787327 (pb)
Human coronaviruses were discovered in the 1960s. They were isolated using two different methods in the United Kingdom and the United States. E.C. Kendall, Malcom Byone, and David Tyrrell working at the Common Cold Unit of the British Medical Research Council in 1960 isolated from a boy a novel common cold virus B814.
Since CV is found in the common cold, and we all have had the common cold, then it seems that traces of it could be found in anyone if the right type of test is done.
https://en.wikipedia.org/wiki/Coronavirus