Tropis Polio Immunization Project (TroPIP)
The Tropis Polio Immunization Project (TroPIP) aimed to evaluate the impact of intradermal (ID) polio vaccine administration using the Tropis® Needle-free Injection System (NFIS) in Nigeria. The project sought to measure vaccine coverage and assess the cost-effectiveness of fractional inactivated poliovirus vaccine (fIPV) delivery through Tropis compared to traditional intramuscular…