Nauru vs San Marino: Number of one-year-olds who are not vaccinated against polio
Nauru
9.27 one-year-olds
in 2023
San Marino
19.89 one-year-olds
in 2023
Nauru rank
190th
San Marino rank
187th
Number of one-year-olds who are not vaccinated against polio over time
- Nauru
- San Marino
How they compare
San Marino currently reports 19.89 one-year-olds against 9.27 one-year-olds in Nauru, a difference of 10.62 one-year-olds.
That makes San Marino's figure about 2.1 times Nauru's.
The two have swapped places 7 times across 40 shared years of data; in 1984 it was Nauru ahead.
Nauru ranks 190th and San Marino ranks 187th of 194 countries.
Across the 5 decades both report, Nauru averaged higher in 3 and San Marino in 2.
Head to head by decade
| Decade | Nauru | San Marino | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 104.13 one-year-olds | 2.29 one-year-olds | 101.84 one-year-olds | Nauru |
| 1990s | 116.12 one-year-olds | 5.03 one-year-olds | 111.1 one-year-olds | Nauru |
| 2000s | 53.34 one-year-olds | 21.83 one-year-olds | 31.51 one-year-olds | Nauru |
| 2010s | 26.6 one-year-olds | 37.15 one-year-olds | 10.55 one-year-olds | San Marino |
| 2020s | 9.73 one-year-olds | 22.35 one-year-olds | 12.62 one-year-olds | San Marino |
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, Nauru or San Marino?
- San Marino, at 19.89 one-year-olds against 9.27 one-year-olds in Nauru as of 2023.
- What is the difference in number of one-year-olds who are not vaccinated against polio between Nauru and San Marino?
- 10.62 one-year-olds, with San Marino ahead.
- How many years of comparable data are there for Nauru and San Marino?
- 40 years are reported by both, from 1984 to 2023.
- How do Nauru and San Marino rank globally for number of one-year-olds who are not vaccinated against polio?
- Nauru ranks 190th and San Marino ranks 187th 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.