| Subject | English | French |
| health. | breakdown of the immune system | dépression du système immunitaire |
| health. | cell-mediated arm of the immune system | cellules assurant l'immunité cellulaire |
| med. | deficient immune system response | réponse déficiente du système immunitaire |
| health. | immune blood-producing system | système immunitaire et sanguin |
| med. | immune system | réseau immunitaire |
| environ. | immune system A body system that helps an organism to resist disease, through the activities of specialised blood cells or antibodies produced by them in response to natural exposure or inoculation | système immunitaire |
| med. | immune system | système immunologique |
| med. | immune system | mécanisme immunitaire |
| med. | immune system | système immunitaire |
| gen. | modulator of the immune system | modulateur du système immunitaire |
| UN | suppression of the body's immune system | immunosuppression |