Safety and Immunogenicity of Vi-CRM197 Vaccine Against S. Typhi in Children, Older Infants and Infants

A Phase 2, Randomized, Controlled, Observer Blind, Single Center Study of the Safety, Reactogenicity and Immunogenicity of the NVGH Glycoconjugate Vaccine Against S. Typhi in Children, Older Infants and Infants

This phase 2 trial is aimed to obtain information on the safety and immunogenicity of the Vi-CRM197 in children and infants from various age groups in the Philippines where Typhoid Fever is highly endemic and an efficacious vaccine against this disease is very much needed.

Inclusion criteria:

• Subjects belonging to 3 age groups will be enrolled into the trial: children (24 to 59 months of age at enrollment), older infants (9 to 12 months of age at enrollment) and infants (6 weeks of age at enrolment).
• Written informed consent will be obtained by the parents/ guardians before enrollment into the trial.
• Infants who have been vaccinated with BCG and HBV at birth and OPV at any time since birth can be enrolled into the trial, while infants who have received DTwP+HBV+Hib due at 6 weeks of age as per local EPI schedule cannot be enrolled into the trial.