Abstract
BackgroundInactivated 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.MethodsIn four towns of Karachi, fIPV was given using needle-free injectors “PharmaJet Tropis ID”. Whereas, in six towns full dose of IPV was administered to children of 4–59 months of age. Cluster surveys through rapid convenience assessment method were conducted after the completion of vaccination activity.ResultsA total of 33,815 households’ data was analyzed. Among these, 27,650 (82.8%) children were vaccinated. In fIPV areas, 85.3% of children were vaccinated compared to 79.5% in full dose IPV areas. A comparison of reasons for unvaccinated showed that 1.6% of parents do not give importance to vaccination in fIPV areas compared to 4.2% in full IPV areas (p-value < 0.0001). More children were not vaccinated due to fear of injection 1.8% in full IPV areas compared to 0.7% in fIPV areas (p-value < 0.0001). The source of campaign information shows that more frequent mobile miking 3.1% was observed in fIPV areas compared to 0.4% in full IPV areas (p-value < 0.0001).ConclusionsOur analysis supports the fractional dose of IPV in mass campaigns to achieve good vaccination coverage especially using needle-free injectors “PharmaJet Tropis ID” and vigorous social mobilization activities are expedient in accomplishing high coverage.
Highlights
Inactivated Polio Vaccine (IPV) campaign was conducted in February 2019 in Karachi where needlefree injectors were introduced for the administration of the fractional dose of IPV on a large scale
A special IPV campaign was conducted in Karachi in February 2019 where needlefree injectors “PharmaJet Tropis ID” were introduced for the administration of the fractional dose of IPV at a large scale
A fractional dose of IPV was received by children of 13,274 (39.3%) households and a full dose by 20,541 (60.7%)
Summary
Inactivated Polio Vaccine (IPV) campaign was conducted in February 2019 in Karachi where needlefree injectors were introduced for the administration of the fractional dose of IPV (fIPV) on a large scale. A special IPV campaign was conducted in Karachi in February 2019 where needlefree injectors “PharmaJet Tropis ID” were introduced for the administration of the fractional dose of IPV at a large scale. The needle-free jet injectors “PharmaJet Tropis ID” deliver vaccines intradermally by the means of a narrow, high-velocity fluid jet, which penetrates the skin and delivers the vaccine into the dermis [13] These needle-free jet injectors have more acceptability among vaccinators due to their ease of administration, can facilitate the large-scale implementation of fIPV [10, 14]. We evaluated the effect of social mobilization activities on the awareness level of the community regarding the IPV campaign
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