Dette gælder uanset om det svækkede imunforsvar skyldes kraftig immunosuppresiv terapi, en genetisk defekt, human immundefekt virus (HIV) infektion eller andre årsager.
Individuals with impaired immune responsiveness, whether due to the use of potent immunosuppressive therapy, a genetic defect, Human Immunodeficiency Virus (HIV) infection, or other causes, may not respond to the vaccine.