<prompt> Neomycin is used in which of the following vaccines to prevent bacterial contamination?OPV and BCGMMR and IPVDPT and HPVHib and HPV  <response>: MMR vaccine and IPV each contains less than 25 mg of neomycin per dose . Persons who are known to be allergic to neomycin should be closely observed after vaccination so that any allergic reaction can be treated at once. 