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/countries/india/who-field-teams-assisted-the-bihar-state-health-department-in-delivering-bivalent-oral-polio-(bopv)-vaccines-in-difficult-to-reach-areas-during-national-immunization-day-on-24-november.jpg?sfvrsn=7ba755ee_4 "WHO field teams assisted the Bihar state health department in delivering bivalent oral polio (bOPV) vaccines in difficult-to-reach areas during National Immunization Day on 24 November")
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