The invention provides an immunogenic composition comprising OMVs and (a) acellular pertussis antigen, (b) a tetanus toxoid and (c) a diphtheria toxoid, wherein the OMVs are derived from Bordetella pertussis. The invention also provides compositions for use in a method for raising an immune response in a patient, comprising the step of administering to the patient a composition of the invention.

Described herein in aspects is a humanized anti-class II MHC antibody, wherein the humanized antibody binds to class II MHC with similar or increased affinity and/or specificity as compared with a non-humanized anti-MHC class II antibody that specifically binds to a shared epitope on most or all HLA-DR molecules. Related methods and uses are also described.