evidence: Introduction: The World Health Organization recommends that, as part of the new polio endgame, a dose of inactivated poliovirus vaccine (IPV) be introduced by the end of 2015 in all countries using only oral poliovirus vaccine (OPV). Administration of fractional dose (1/5th of full dose) IPV (fIPV) intradermally may reduce costs, but its administration is cumbersome with BCG needle and syringe. We evaluated performance of two newly developed intradermal-only jet injectors and compared the immune response induced by fIPV with that induced by full-dose IPV. [...] Keywords: Inactivated poliovirus vaccine; Intradermal administration; Poliomyelitis. [...] Needle-free jet injector intradermal delivery of fractional dose inactivated poliovirus vaccine: Association between injection quality and immunogenicity.Vaccine. 2015 Oct 26;33(43):5873-5877. doi: 10.1016/j.vaccine.2015.06.071. Epub 2015 Jul 17. PMID: 26192350 Clinical Trial.