This is the 12074th most frequent Spanish word.
inmunitaria
Related to the immune system.
Here, 'inmunitario' is used as an adjective describing 'sistema', meaning 'related to the immune system'.
El sistema inmunitario protege al cuerpo contra enfermedades.
The immune system protects the body against diseases.
In this sentence, 'inmunitaria' qualifies 'respuesta', signifying that the response is related to the immune system's functioning.
La respuesta inmunitaria se activa cuando el cuerpo detecta patógenos.
The immune response is activated when the body detects pathogens.
Here, 'inmunitaria' is used to describe 'función', denoting characteristics related to immunity or the immune system.