Immunogenicity of fractional one-fifth and one-half doses of 17DD yellow fever vaccine compared with full dose in children aged 9-23 months in Uganda: a phase 4, single-blind, randomised clinical trial.
Both fractional doses of 17DD yellow fever vaccine were non-inferior to full doses in inducing initial seroconversion and support the use of fractional dose yellow fever vaccines among young children for outbreak response during supply shortages.