{"id": 1357665, "name": "Reported polio cases", "unit": "cases", "createdAt": "2026-11-13T14:53:30.000Z", "updatedAt": "2026-11-13T14:53:30.000Z", "coverage": "", "timespan": "1910-2025", "datasetId": 8277, "columnOrder": 0, "shortName": "cases", "catalogPath": "grapher/health/2026-11-06/polio_cases/polio_cases#cases", "descriptionShort": "Number of reported polio cases in the United States in a given year.", "type": "int", "datasetName": "Long-run reported polio cases in the United States", "updatePeriodDays": 365, "datasetVersion": "2026-11-06", "nonRedistributable": false, "display": {"name": "Reported cases", "unit": "cases", "numDecimalPlaces": 0}, "schemaVersion": 2, "processingLevel": "minor", "presentation": {"titlePublic": "Reported polio cases", "attributionShort": "CDC and others", "topicTagsLinks": ["Vaccination"]}, "descriptionKey": "- These are cases reported to public health authorities. Most poliovirus infections cause no symptoms or only mild ones, so they are not counted here.\n- What counts as a case changes in 1984. Until 1983, these counts include all reported polio cases, both paralytic and nonparalytic. From 1984 onward, they include paralytic cases only. By then, almost all reported cases were paralytic, so the change makes little difference: in 1983, both counts were 15.\n- Before the 1950s, nonparalytic polio could not be confirmed in a laboratory. Some of the cases counted in those years were probably other viral infections with similar symptoms.\n- Counts for 2024 and 2025 are provisional. They come from the Centers for Disease Control and Prevention's (CDC) weekly surveillance data, which can still be revised before the CDC publishes its finalized annual tables.", "dimensions": {"years": {"values": [{"id": 1910}, {"id": 1911}, {"id": 1913}, {"id": 1914}, {"id": 1915}, {"id": 1916}, {"id": 1917}, {"id": 1918}, {"id": 1919}, {"id": 1920}, {"id": 1921}, {"id": 1922}, {"id": 1923}, {"id": 1924}, {"id": 1925}, {"id": 1926}, {"id": 1927}, {"id": 1928}, {"id": 1929}, {"id": 1930}, {"id": 1931}, {"id": 1932}, {"id": 1933}, {"id": 1934}, {"id": 1935}, {"id": 1936}, {"id": 1937}, {"id": 1938}, {"id": 1939}, {"id": 1940}, {"id": 1941}, {"id": 1942}, {"id": 1943}, {"id": 1944}, {"id": 1945}, {"id": 1946}, {"id": 1947}, {"id": 1948}, {"id": 1949}, {"id": 1950}, {"id": 1951}, {"id": 1952}, {"id": 1953}, {"id": 1954}, {"id": 1955}, {"id": 1956}, {"id": 1957}, {"id": 1958}, {"id": 1959}, {"id": 1960}, {"id": 1961}, {"id": 1962}, {"id": 1963}, {"id": 1964}, {"id": 1965}, {"id": 1966}, {"id": 1967}, {"id": 1968}, {"id": 1969}, {"id": 1970}, {"id": 1971}, {"id": 1972}, {"id": 1973}, {"id": 1974}, {"id": 1975}, {"id": 1976}, {"id": 1977}, {"id": 1978}, {"id": 1979}, {"id": 1980}, {"id": 1981}, {"id": 1982}, {"id": 1983}, {"id": 1984}, {"id": 1985}, {"id": 1986}, {"id": 1987}, {"id": 1988}, {"id": 1989}, {"id": 1990}, {"id": 1991}, {"id": 1992}, {"id": 1993}, {"id": 1994}, {"id": 1995}, {"id": 1996}, {"id": 1997}, {"id": 1998}, {"id": 1999}, {"id": 2000}, {"id": 2001}, {"id": 2002}, {"id": 2003}, {"id": 2004}, {"id": 2005}, {"id": 2006}, {"id": 2007}, {"id": 2008}, {"id": 2009}, {"id": 2010}, {"id": 2011}, {"id": 2012}, {"id": 2013}, {"id": 2014}, {"id": 2015}, {"id": 2016}, {"id": 2017}, {"id": 2018}, {"id": 2019}, {"id": 2020}, {"id": 2021}, {"id": 2022}, {"id": 2023}, {"id": 2024}, {"id": 2025}]}, "entities": {"values": [{"id": 13, "name": "United States", "code": "USA"}]}}, "origins": [{"id": 24721, "title": "Historical polio cases in the United States \u2013 Public Health Reports", "description": "Data on historical polio cases in the United States, compiled from a selection of sources from the United States - Public Health Reports.\n\nSources for each year are as follows:\n\n* 1910-11: [Public Health Reports Vol. 27, No. 16 \u201cPoliomyelitis in the United States, 1910 and 1911\"](https://www.jstor.org/stable/4567726?seq=4)\n\n* 1913: [Public Health Reports Vol. 29, No. 28 \u201cThe Notifiable Diseases: Their Prevalence by States during 1913\u201d](https://www.jstor.org/stable/4570998?seq=12)\n\n* 1914: [Public Health Reports Vol. 39, No. 36 \u201cThe Notifiable Diseases: Reported Prevalence during 1914 by States\u201d](https://www.jstor.org/stable/4572751?seq=7)\n\n* 1915-1937: [Public Health Reports Vol. 54, No. 21 \u201cPrevalence of Poliomyelitis in the United States in 1938\u201d](https://www.jstor.org/stable/4582892?seq=1)\n\n* 1938: [Public Health Reports Vol. 55, No. 10 \u201cNotifiable Diseases in the United States, 1938: Morbidity and Mortality Summaries for Certain Important Communicable Diseases\"](https://www.jstor.org/stable/4583204?seq=1)\n\n* 1939: [Public Health Reports, Vol. 56, No. 7 - Notifiable Diseases in the United States, 1939: Morbidity and Mortality Summaries for Certain Important Communicable Diseases (1941)](https://www.jstor.org/stable/4583620)\n\n* 1940: [Public Health Reports, Vol. 57, No. 7 - Notifiable Diseases in the United States, 1940: Morbidity and Mortality Summaries for Certain Important Communicable Diseases (1942)](https://www.jstor.org/stable/4584013)\n\n* 1942-1947: [Public Health Reports Vol. 63, No. 13 - Incidence of Poliomyelitis in 1947](https://www.jstor.org/stable/4586491)\n\n* 1948-1949: [Public Health Reports Vol. 67, No. 6 - Poliomyelitis in the United States, 1951](https://www.jstor.org/stable/4588131)", "producer": "Public Health Reports", "citationFull": "Public Health Reports Vol. 27, No. 16 \u201cPoliomyelitis in the United States, 1910 and 1911\"\n\nPublic Health Reports Vol. 29, No. 28 \u201cThe Notifiable Diseases: Their Prevalence by States during 1913\u201d\n\nPublic Health Reports Vol. 39, No. 36 \u201cThe Notifiable Diseases: Reported Prevalence during 1914 by States\u201d\n\nPublic Health Reports Vol. 54, No. 21 \u201cPrevalence of Poliomyelitis in the United States in 1938\u201d\n\nPublic Health Reports Vol. 55, No. 10 \u201cNotifiable Diseases in the United States, 1938: Morbidity and Mortality Summaries for Certain Important Communicable Diseases\"\n\nPublic Health Reports, Vol. 56, No. 7 \u2013 Notifiable Diseases in the United States, 1939: Morbidity and Mortality Summaries for Certain Important Communicable Diseases (1941)\n\nPublic Health Reports, Vol. 57, No. 7 \u2013 Notifiable Diseases in the United States, 1940: Morbidity and Mortality Summaries for Certain Important Communicable Diseases (1942)\n\nPublic Health Reports Vol. 63, No. 13 \u2013 Incidence of Poliomyelitis in 1947\n\nPublic Health Reports Vol. 67, No. 6 \u2013 Poliomyelitis in the United States, 1951", "urlMain": "https://www.jstor.org/stable/4588131", "dateAccessed": "2025-03-12", "datePublished": "1942-02-13", "license": {"name": "Public domain"}}, {"id": 28446, "title": "Historical polio cases in the United States \u2013 United States Census Bureau", "description": "Data on historical polio cases in the United States, from the United States Census Bureau.\n\n* 1941: [Statistical Abstract of the United States: 1944-45 (Part 2 - Vital Statistics, Page 82)](https://www.census.gov/library/publications/1945/compendia/statab/66ed.html)", "producer": "United States Census Bureau", "citationFull": "Statistical Abstract of the United States: 1944-45 (1945), United States Census Bureau.", "urlMain": "https://www.census.gov/library/publications/1945/compendia/statab/66ed.html", "dateAccessed": "2025-02-25", "datePublished": "1945-10-01", "license": {"name": "Public domain"}}, {"id": 28447, "title": "Historical polio cases in the United States \u2013 Centers for Disease Control and Prevention", "description": "Data on historical polio cases in the United States, compiled from a selection of sources from the US CDC.\n\nUntil 1983, the counts include all reported polio cases, both paralytic and nonparalytic. From 1984, they are paralytic polio cases only.\n\nSources for each year are as follows:\n\n* 1944-1983 (all reported cases) and 1984-1993 (paralytic cases): [Morbidity and Mortality Weekly Report Summary of Notifiable Diseases, United States, 1993, Table 6](https://www.cdc.gov/mmwr/preview/mmwrhtml/00035381.htm)\n\n* 1994-2001: [PART 3: Historical Summaries of Notifiable Diseases in the United States, 1969\u20132000; Morbidity and Mortality Weekly Report, Vol. 49, No. 53, Summary of Notifiable Diseases \u2014 United States, 2000](https://www.jstor.org/stable/23310295?seq=2)\n\n* 2002: [Summary of Notifiable Diseases --- United States, 2002](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5153a1.htm)\n\n* 2003: [Summary of Notifiable Diseases --- United States, 2003](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5254a1.htm)\n\n* 2004: [Summary of Notifiable Diseases --- United States, 2004](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5353a1.htm)\n\n* 2005: [Summary of Notifiable Diseases --- United States, 2005](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5453a1.htm)\n\n* 2006: [Summary of Notifiable Diseases --- United States, 2006](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5553a1.htm)\n\n* 2007: [Summary of Notifiable Diseases --- United States, 2007](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5653a1.htm)\n\n* 2008: [Summary of Notifiable Diseases --- United States, 2008](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5754a1.htm)\n\n* 2009: [Summary of Notifiable Diseases --- United States, 2009](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5853a1.htm)\n\n* 2010: [Summary of Notifiable Diseases --- United States, 2010](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5953a1.htm)\n\n* 2011: [Summary of Notifiable Diseases --- United States, 2011](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6053a1.htm)\n\n* 2012: [Summary of Notifiable Diseases --- United States, 2012](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6153a1.htm)\n\n* 2013: [Summary of Notifiable Diseases --- United States, 2013](https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6253a1.htm)\n\n* 2014: [Summary of Notifiable Diseases --- United States, 2014](https://www.cdc.gov/mmwr/volumes/63/wr/mm6354a1.htm)\n\n* 2015: [Summary of Notifiable Diseases --- United States, 2015](https://www.cdc.gov/mmwr/volumes/64/wr/mm6453a1.htm)\n\n* 2016-2022: [National Notifiable Diseases Surveillance System (NNDSS) - Centers for Disease Control and Prevention (CDC)](https://wonder.cdc.gov/nndss-annual-summary.html)\n\n* 2023: [National Notifiable Diseases Surveillance System, 2023 Annual Tables of Infectious Disease Data, Table 1](https://stacks.cdc.gov/view/cdc/251097)\n\n* 2024-2025: [National Notifiable Diseases Surveillance System (NNDSS) Weekly Data](https://data.cdc.gov/NNDSS/NNDSS-Weekly-Data/x9gk-5huc). These counts are provisional: the CDC has not yet published its finalized annual tables for these years.", "producer": "Centers for Disease Control and Prevention", "citationFull": "Morbidity and Mortality Weekly Report Summary of Notifiable Diseases, United States, 1993\n\nHistorical Summaries of Notifiable Diseases in the United States, 1969\u20132000; Morbidity and Mortality Weekly Report, Vol. 49, No. 53, Summary of Notifiable Diseases \u2014 United States, 2000\n\nSummary of Notifiable Diseases --- United States, 2002-2015\n\nNational Notifiable Diseases Surveillance System (NNDSS) \u2013 Centers for Disease Control and Prevention (CDC)\n\nCenters for Disease Control and Prevention. National Notifiable Diseases Surveillance System, 2023 Annual Tables of Infectious Disease Data. Atlanta, GA. CDC Office of Public Health Data, Surveillance, and Technology, 2025.\n\nCenters for Disease Control and Prevention. National Notifiable Diseases Surveillance System (NNDSS) Weekly Data, 2026.", "urlMain": "https://www.cdc.gov/nndss/infectious-disease/weekly-and-annual-disease-data-tables.html", "dateAccessed": "2026-11-06", "datePublished": "2026-11-04", "license": {"name": "Public domain"}}]}