| IBV | infectious bronchitis vaccine; infectious bronchitis virus |
|---|---|
| IDT | immune diffusion test; instillation delivery time; intradermal typhoid [vaccine] |
| IPV | inactivated poliomyelitis vaccine or virus; infectious pustular vaginitis; infectious pustular vulvo... |
| ISCO | immunostimulating complex [vaccine] |
| IVV | influenza virus vaccine; intravenous vasopressin |