Reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad
Chad: Reported cases of paralytic polio from wild vs. vaccine-derived polioviruses was 55 cases in 2023. ◆ Volatile
Reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad, 2001–2023
Source: World Health Organization (2024) – processed by Our World in Data. Measured in cases.
Analysis
The most recent figure for reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad is 55 cases, measured in 2023.
Compared with earlier readings it is up 25.0% on the previous year and up 1,733.3% over ten years.
Over the whole period, reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad peaked at 101 cases in 2020 and was at its lowest, 0 cases, in 2001.
That places Chad 3rd out of 173 countries with data for 2023, putting it in the top 10%.
The series is highly variable year to year, so single readings are best treated with caution.
Reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad, year by year
| Year | cases | Change |
|---|---|---|
| 2001 | 0 cases | — |
| 2002 | 0 cases | — |
| 2003 | 0 cases | — |
| 2004 | 0 cases | — |
| 2005 | 0 cases | — |
| 2006 | 0 cases | — |
| 2007 | 0 cases | — |
| 2008 | 0 cases | — |
| 2009 | 0 cases | — |
| 2010 | 1 cases | — |
| 2011 | 0 cases | -100.0% |
| 2012 | 12 cases | — |
| 2013 | 3 cases | -75.0% |
| 2014 | 0 cases | -100.0% |
| 2015 | 0 cases | — |
| 2016 | 0 cases | — |
| 2017 | 0 cases | — |
| 2018 | 0 cases | — |
| 2019 | 11 cases | — |
| 2020 | 101 cases | +818.2% |
| 2021 | 0 cases | -100.0% |
| 2022 | 44 cases | — |
| 2023 | 55 cases | +25.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 0 cases | 0 cases | 0 cases | 9 |
| 2010s | 2.7 cases | 0 cases | 12 cases | 10 |
| 2020s | 50 cases | 0 cases | 101 cases | 4 |
Countries ranked near Chad
- 1 Congo, Democratic Republic of the 223 cases compare
- 2 Nigeria 87 cases compare
- 4 Guinea 47 cases compare
- 5 Madagascar 24 cases compare
- 6 Mali 15 cases compare
More health data for Chad
- Un projection of annual infant deaths, annual growth rate -0.9964 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.6578 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,071 deaths per 1,000 people (2090)
- Number of infants who die before age 1 41,435 deaths (2100)
- Population ages 60-64, female, annual growth rate 4.89 % change on previous year (2025)
- Population ages 60-64, female, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 60-64, female, per capita 0.0075 units per person (2025)
- Population ages 60-64, male, annual growth rate 4.93 % change on previous year (2025)
- Population ages 60-64, male, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 60-64, male, per capita 0.0068 units per person (2025)
Frequently asked questions
- What is reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad?
- Reported cases of paralytic polio from wild vs. vaccine-derived polioviruses in Chad was 55 cases in 2023, according to World Health Organization (2024) – processed by Our World in Data.
- What is the highest reported cases of paralytic polio from wild vs. vaccine-derived polioviruses recorded in Chad?
- The highest recorded value was 101 cases in 2020.
- What is the lowest reported cases of paralytic polio from wild vs. vaccine-derived polioviruses recorded in Chad?
- The lowest recorded value was 0 cases in 2001.
- How does Chad rank for reported cases of paralytic polio from wild vs. vaccine-derived polioviruses?
- Chad ranks 3rd out of 173 countries with data for 2023.
- Is reported cases of paralytic polio from wild vs. vaccine-derived polioviruses rising or falling in Chad?
- Over the last ten years it is up 1,733.3%. The long-run trend across the full record is volatile.
- Where does this Chad data come from?
- The figures come from World Health Organization (2024) – processed by Our World in Data, published as part of Reported cases of paralytic polio from wild vs. vaccine-derived polioviruses. Statizoid updates them automatically from the source API.
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About this data
Number of cases of circulating vaccine-derived poliovirus detected in a given year.