Immunogenicity of a Psoralen-Inactivated Dengue Virus Type 1 Vaccine Candidate in Mice

We evaluated a novel psoralen-inactivated dengue virus type 1 (DENV-1) vaccine candidate in Mus musculus mice. Mice received intradermal alum or 5 to 10 ng of psoralen-inactivated virus. Anti-DENV-1 neutralizing antibody was detectable in 10/11 mice receiving a 10-ng dose at 90 days. Psoralen-inactivated DENV-1 is immunogenic in mice.