52 Børn med svækket immunforsvar, hvad enten det skyldes immunhæmmende behandling, en genetisk defekt, HIV- infektion eller andre årsager, kan have reduceret antistofrespons over for aktiv immunisering.
Children with impaired immune responsiveness, whether due to the use of immunosuppressive therapy, a genetic defect, HIV infection, or other causes, may have reduced antibody response to active immunisation.