| 424 / | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
| 184.1 | DF | ANTIGEN, EPITOPE, OR OTHER IMMUNOSPECIFIC IMMUNOEFFECTOR (E.G., IMMUNOSPECIFIC VACCINE, IMMUNOSPECIFIC STIMULATOR OF CELL-MEDIATED IMMUNITY, IMMUNOSPECIFIC TOLEROGEN, IMMUNOSPECIFIC IMMUNOSUPPRESSOR, ETC.) {15} |
| 204.1 | DF | .~ Virus or component thereof {13} |
| 221.1 | DF | .~.~ Coronaviridae (e.g., neonatal calf diarrhea virus, feline infectious peritonitis virus, canine coronavirus, etc.) {2} |
| 222.1 | | .~.~.~ Infectious bronchitis virus (IBV) |