There have been multiple studies in avian coronavirus, and should be noted as a background for more comprensive research for SARS CoV 2: Factors of influence on the level of success in detection after a disease outbreak, as are the possibilities and dangers of strain classification by protectotyping, serotyping, epitope-typing and genotyping.
Reference J. J. De Wit (2000) Detection of infectious bronchitis virus, Avian Pathology, 29:2, 71-93, DOI: 10.1080/03079450094108 The detection methods for infectious bronchitis virus (IBV) are reviewed. Advantages and disadvantages of available techniques of IBV detection by virus isolation, antigen or genome detection, and serology are discussed. Factors of influence on the level of success in detection of IBV after a disease outbreak are discussed, as are the possibilities and dangers of strain classification by protectotyping, serotyping, epitope-typing and genotyping.
