Estimating population immunity to poliovirus in Jordan's high-risk areas

A community-based serosurvey was conducted among children ages 6-59 to assess population immunity in Jordan's high-risk areas following the Middle East polio outbreak response. The survey was a two-stage cluster-quota sample with high risk areas as the primary sampling units. High-risk areas in...

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Bibliographic Details
Published in:Human vaccines & immunotherapeutics 2020-03, Vol.16 (3), p.548-553
Main Authors: Farag, Noha H., Wannemuehler, Kathleen, Weldon, William, Arbaji, Ali, Belbaisi, Adel, Khuri-Bulos, Najwa, Ehrhardt, Derek, Surour, Mohammad Ratib, ElhajQasem, Nabil Sabri, Al-Abdallat, Mohammad Mousa
Format: Article
Language:English
Subjects:
immunization strategy
Jordan
oral polio vaccine
Poliovirus
Research Paper
seroprevalence
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Summary:A community-based serosurvey was conducted among children ages 6-59 to assess population immunity in Jordan's high-risk areas following the Middle East polio outbreak response. The survey was a two-stage cluster-quota sample with high risk areas as the primary sampling units. High-risk areas included border and hard-to-reach areas, and areas with a high proportion of refugees, mobile communities and/or low coverage during previous immunization campaigns. Population immunity to poliovirus was high overall. In high-risk areas, Type 1 seroprevalence = 98% (95% CI = 96, 99), Type 2 = 98% (95% CI = 96, 99) and Type 3 = 96% (95% CI = 94, 98). Seroprevalence was higher in the refugee camps: Type 1 seroprevalence = 99.6% (95% CI = 97.9, 100); Type 2: 99.6% (95% CI = 97.9, 99.9), and Type 3: 100% (95% CI = 100,100). The vigilance that the Jordan Ministry of Health has placed on locating and vaccinating high-risk populations has been successful in maintaining high population immunity and averting polio outbreaks despite the influx of refugees from Syria.
ISSN:2164-5515
2164-554X
DOI:10.1080/21645515.2019.1667727