Buzz
With recent news about polio, many individuals are questioning whether they received the polio vaccine during childhood. If you were raised in the U.S., chances are high that you were vaccinated.
Who is most likely to have received the polio vaccine?
From its inception, the polio vaccine was a groundbreaking development. In 1955, the Salk injectable vaccine trial was unveiled with immense excitement, leading to widespread vaccination efforts. Shortly after, the Sabin oral vaccine was also approved and became widely administered.
For several decades, polio vaccinations became a standard practice for children in the U.S. and numerous other countries. Since 1980, the vaccination rate for one-year-olds in the U.S. has consistently remained at 95% or above.
According to the CDC :
The majority of adults (those aged 18 and older) in the United States are considered immune to poliovirus due to routine childhood vaccinations, and their risk of exposure to the virus within the country is minimal.
What became of polio?
The final naturally occurring polio case in the U.S. was recorded in 1979. The success of vaccination efforts led the World Health Organization to aim for polio eradication in the Americas by 1990. Although the target wasn’t fully met by the deadline, both continents were declared polio-free by 1994. The global campaign to eradicate polio persists, as it remains one of the few diseases with the potential for complete elimination.
Children continue to receive polio vaccinations today. Unlike smallpox, which was eradicated globally (the only human disease to achieve this status), smallpox vaccines were removed from routine schedules as they became unnecessary. However, polio vaccines remain essential because the disease still exists in certain regions. If an infected individual were to enter the U.S., maintaining an 80-85% immunity rate is crucial to prevent the virus from spreading. This is why polio vaccination remains a standard part of immunization schedules.
Currently, the injectable polio vaccine is administered as part of routine childhood immunizations, with a four-dose series beginning at two months of age and concluding around age four. (The oral vaccine is no longer commonly used in the U.S., but if you recall receiving a vaccine on a sugar cube, it was likely the oral version. Learn more about the differences between the two vaccines here.)
How can I confirm if I received the polio vaccine?
The U.S. lacks a centralized vaccine registry, so determining your vaccination status depends on your personal medical records. If you’ve consistently updated your records when switching healthcare providers, they may include details about your polio vaccination. However, for most people, this information is likely stored elsewhere and difficult to access.
Consider asking your parents or requesting medical records from the doctor or hospital where you were treated as a child, if you can recall or identify the location. School records may also help, as schools often require immunization proof for various diseases. While it’s unlikely your elementary school still has your records, you might find health forms in old files alongside report cards. Additionally, if your parents maintained a baby book, it could contain relevant information.
Certain states maintain vaccine registries. The CDC advises contacting your local or state health department to determine if there’s a method to access your vaccination records.
What should I do if I’m unsure whether my polio vaccination is current?
If you’re uncertain about your vaccination status or whether you completed the full series, you can still receive the vaccine again. (As a note: Receiving an additional dose of a vaccine is generally safe. If you’re unsure about your vaccination history, your healthcare provider will typically recommend getting another dose.)
The CDC suggests completing a three-dose series of the polio vaccine if your vaccination status is unknown. This recommendation applies equally to those who are unvaccinated.
If you’re aware that you’ve received some but not all doses of the vaccine, you can complete the series. The CDC website provides detailed guidance on the number of doses required and the appropriate timing for administration.
Lastly, if you’ve already been vaccinated but are now at a “higher risk” of exposure and want to ensure maximum protection, you may receive one booster dose—considered sufficient for lifelong immunity. You are deemed “higher risk” in scenarios such as traveling to a country where polio is endemic, working as a scientist or healthcare professional with potential exposure to the virus, or being in contact with individuals who may have polio.
