Clinical study published in Vaccine cites superiority of two fractional doses administered intradermally to one full intramuscular dose. Expands use of PharmaJet Tropis Needle-free Injector

The polio eradication endgame strategic plan calls for the sequential removal of Sabin poliovirus serotypes from the trivalent oral poliovirus vaccine (tOPV), starting with type 2, and the introduction of ≥1 dose of inactivated poliovirus vaccine (IPV), to maintain an immunity base against poliovirus type 2.