Primary Immunodeficiency with Post-Measles-Mumps-Rubella Vaccine Viral Infection, also known as primary immunodeficiency with post-mmr vaccine viral infection, is related to immunodeficiency 44 and immunodeficiency 45. An important gene associated with Primary Immunodeficiency with Post-Measles-Mumps-Rubella Vaccine Viral Infection is STAT2 (Signal Transducer And Activator Of Transcription 2), and among its related pathways/superpathways are Antiviral mechanism by IFN-stimulated genes and Toll-like receptor signaling pathway.