| HPV | Hemophilus pertussis vaccine; hepatic portal vein; human papillomavirus; human parvovirus; hypoxic p... |
|---|---|
| IBV | infectious bronchitis vaccine; infectious bronchitis virus |
| IPV | inactivated poliomyelitis vaccine or virus; infectious pustular vaginitis; infectious pustular vulvo... |
| ISCO | immunostimulating complex [vaccine] |
| IVV | influenza virus vaccine; intravenous vasopressin |