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Data source: VAERS (Vaccine Adverse Event Reporting System)

Data through 2026 · Updated quarterly

Built by TheDataProject.ai · © 2026 VaccineWatch

Important: VAERS accepts reports of adverse events following vaccination. For any given report, there is no certainty that the reported event was caused by the vaccine. Reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Most reports to VAERS are voluntary, which means they are subject to biases. This data cannot be used to determine if vaccines cause or contribute to adverse events.

⚠️

Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.

  1. Home
  2. Vaccines
  3. Polio (Inactivated) (Ipol)
  4. 1997
Polio (Inactivated) (Ipol)1997

Polio (Inactivated) (Ipol) in 1997

344 adverse event reports (+291% vs 1996)

Share
344
Reports
31
Deaths
50
Hospitalizations
142
ER Visits
5
Disabilities
← 1996 (88 reports)1998 (611 reports) →

1997 Reporting Summary

In 1997, 344 adverse event reports were filed for Polio (Inactivated) (Ipol) in VAERS. This represents 0.8% of all 44,360 reports for this vaccine.

Of these reports, 31 mentioned death, 50 involved hospitalization, 142 required ER visits, and 5 reported disability.

Compared to the average of 1,206 reports per year for this vaccine, 1997 was below average (-71%).

💡 What This Means

Year-over-year change: The large change from 1996 likely reflects a ramp-up in vaccination (e.g., new vaccine rollout or expanded eligibility) rather than a change in per-dose risk.

All Years for Polio (Inactivated) (Ipol)

YearReportsDeathsHosp.
2025530011
2024691415
202358314
202253457
2021419016
2020348019
2019534218
2018446319
2017541425
2016631424
2015549020
2014631042
20137351055
2012689539
20118881050
20101,031552
20091,3251798
20082,38720202
20072,77824271
20062,74531174
20052,99435171
20043,53091177
20033,88786235
20023,659125286
20013,19194338
20002,26575260
19991,16572299
19986114985
1997 ← current3443150
199688117
19956417
19946856
19937236
19925618

Understanding Yearly Data

•Spikes may reflect awareness: Years with unusual activity (e.g., pandemic) often see increased reporting.
•Dose volume matters: More vaccinations given in a year naturally leads to more reports.
•Reporting lag: Some events are reported months after they occur, so recent years may be incomplete.

Quick Facts

Reports:344
Deaths:31
Hospitalizations:50
% of Total:0.8%
Rank (by vol.):#29 of 34 years
Avg/year:1,206

Related Pages

Polio (Inactivated) (Ipol) Overview← 1996 Reports1998 Reports →35 Years of ReportingCompare Vaccines

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.