It's probably because your definition of "isolated" isn't considered necessary for a virus to be real. Koch's postulates don't need to be adhered to and viruses require a culture and are isolated in cells.
It's probably because your definition of "isolated" isn't considered necessary for a virus to be real. Koch's postulates don't need to be adhered to and viruses require a culture and are isolated in cells.
It's probably because your definition of "isolated" isn't considered necessary for a virus to be real. Koch's postulates don't need to be adhered to and viruses require a culture and are isolated in cells.