Brazil vs Tanzania: Number of one-year-olds who are not vaccinated against polio
Brazil
392,271 one-year-olds
in 2023
Tanzania
441,878 one-year-olds
in 2023
Brazil rank
13th
Tanzania rank
11th
Number of one-year-olds who are not vaccinated against polio over time
- Brazil
- Tanzania
How they compare
Tanzania currently reports 441,878 one-year-olds against 392,271 one-year-olds in Brazil, a difference of 49,607 one-year-olds.
That makes Tanzania's figure about 1.1 times Brazil's.
The two have swapped places 7 times across 44 shared years of data; in 1980 it was Brazil ahead.
Brazil ranks 13th and Tanzania ranks 11th of 194 countries.
Across the 5 decades both report, Brazil averaged higher in 4 and Tanzania in 1.
Head to head by decade
| Decade | Brazil | Tanzania | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 1.69 million one-year-olds | 331,003 one-year-olds | 1.36 million one-year-olds | Brazil |
| 1990s | 813,970 one-year-olds | 223,192 one-year-olds | 590,778 one-year-olds | Brazil |
| 2000s | 31,880 one-year-olds | 192,798 one-year-olds | 160,918 one-year-olds | Tanzania |
| 2010s | 262,079 one-year-olds | 182,477 one-year-olds | 79,602 one-year-olds | Brazil |
| 2020s | 663,949 one-year-olds | 602,182 one-year-olds | 61,767 one-year-olds | Brazil |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher number of one-year-olds who are not vaccinated against polio, Brazil or Tanzania?
- Tanzania, at 441,878 one-year-olds against 392,271 one-year-olds in Brazil as of 2023.
- What is the difference in number of one-year-olds who are not vaccinated against polio between Brazil and Tanzania?
- 49,607 one-year-olds, with Tanzania ahead.
- How many years of comparable data are there for Brazil and Tanzania?
- 44 years are reported by both, from 1980 to 2023.
- How do Brazil and Tanzania rank globally for number of one-year-olds who are not vaccinated against polio?
- Brazil ranks 13th and Tanzania ranks 11th of 194 countries.
- Where does this data come from?
- WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as Number of one-year-olds who are not vaccinated against polio. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Number of one-year-olds who have not had the third dose of either the oral or inactivated polio vaccine in a given year.