Methods and compositions are disclosed for improving vaccination in a subject with preexistent antibodies to the antigenic component of the immunizing vaccine. By temporarily sequestering, disabling, and/or suppressing preexistent antibodies and/or Fc-mediated mechanisms according to the various example embodiments, the target antigenic component of a vaccine has an increased opportunity to enter antigen-presenting cells through the same pathway that it would use in seronegative subjects. A balanced immune environment is thereby restored and B cells are properly activated to produce antigen-specific antibodies following vaccination.