BMC Public Health
January 2021
Background: Inactivated Polio Vaccine (IPV) campaign was conducted in February 2019 in Karachi where needle-free injectors were introduced for the administration of the fractional dose of IPV (fIPV) on a large scale. This study aimed to determine the impact of needle-free injectors on vaccination coverage.
Methods: In four towns of Karachi, fIPV was given using needle-free injectors "PharmaJet Tropis ID".