This vaccine is a product made of precipitated and purified pertussis, diphtheria, tetanus (DPT vaccine) of Kitasato Daiichi Sankyo and inactivated polio vaccine (Salk vaccine) (eIPV:Enhanced Inactivated Poliomyelitis Vaccine) of Sanofi Pasteur in a prefilled syringe, and is the first 4-valent combination vaccine in Japan that contains inactivated polio vaccine (Salk vaccine).