| Acronym | Definition |
|---|
| NIVS➣National Influenza Vaccine Summit (est. 2000; annual conference; American Medical Association; US CDC) |
| NIVS➣Noninvasive Ventilatory Support |
| NIVS➣Non-Invasive Vaccination Onto the Skin |
| NIVS➣Nazarenes in Voluntary Service |
| NIVS➣Norfolk Independent Visitors Scheme (Norfolk Children's Services; UK) |