Reactogenicity and Immunogenicity of a Lyme Disease Vaccine in Children 2–5 Years Old

Abstract
Two doses of a recombinant Lyme disease vaccine (15 and 30 microg) were administered to children 2-5 years old (0-1-month schedule) and were well tolerated. Both doses were highly immunogenic with geometric mean titers 1 month after vaccination of 4366 and 9877 ELISA units (EU)/mL, respectively. Nearly all subjects had antibody levels of > or = 1400 EU/mL, suggesting protective tick titre for one tick season.