{"entity":{"iso2":"ST","iso3":"STP","name":"Sao Tome and Principe","slug":"sao-tome-and-principe"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"ipv1-number-unvaccinated","source":"WHO & UNICEF (2025); UN, World Population Prospects (2024) \u2013 processed by Our World in Data","source_url":"https://ourworldindata.org/grapher/ipv1-number-unvaccinated","title":"Number of one-year-olds who have not received the inactivated polio vaccine","unit":"one-year-olds"},"observations":[{"date":"2016-01-01","value":2052.27},{"date":"2017-01-01","value":3288.6},{"date":"2018-01-01","value":178.77},{"date":"2019-01-01","value":293.9},{"date":"2020-01-01","value":357.6},{"date":"2021-01-01","value":423.5},{"date":"2022-01-01","value":795.21},{"date":"2023-01-01","value":1187.69}],"summary":{"latest_period":"2023-01-01","latest_value":1187.69,"max":3288.6,"mean":1072.19,"min":178.77,"of":194,"rank":141,"trend":"volatile"}}