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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.

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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. Tdap (Boostrix)
  4. Injection site inflammation
Tdap (Boostrix)×Injection site inflammation

Injection site inflammation Reports for Tdap (Boostrix)

#142 most reported symptom for this vaccine

236
Reports
0
Deaths
9
Hospitalizations
0
Mortality Rate
%
3.8
Hosp. Rate
%

Injection site inflammation and Tdap (Boostrix)

Injection site inflammation has been reported 236 times in association with Tdap (Boostrix) vaccination in VAERS. This represents 0.4% of all 52,846 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 9 involved hospitalization (3.8%).

Injection site inflammation is the #142 most frequently reported symptom for Tdap (Boostrix) out of 2243 total symptoms.

Disclaimer: VAERS reports describe events that occurred after vaccination but do not establish that the vaccine caused the event. Many reported symptoms may be coincidental or related to underlying conditions.

What This Means

Seeing 236 reports of Injection site inflammation after Tdap (Boostrix) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.00%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Injection site inflammation occurred after vaccination, not that the vaccine caused it.
•Background rates: Injection site inflammation may occur naturally at baseline rates in the population, unrelated to vaccination.
•Anyone can report: VAERS accepts reports from anyone — patients, parents, healthcare providers — without requiring medical verification.
•Denominator missing: VAERS counts reports, not rates per dose. Without knowing how many doses were given, raw counts can be misleading. Learn more →

Similarly Ranked Symptoms

White blood cell count increased237 reportsFeeling cold236 reportsElectrocardiogram236 reportsIncorrect dose administered233 reports

Quick Facts

Reports:236
Deaths:0
Hospitalizations:9
% of Vaccine:0.4%
Rank:#142 of 2243

Related Pages

Tdap (Boostrix) OverviewInjection site inflammation (All Vaccines)Why Raw Numbers MisleadTop Symptoms Analysis

Data Source

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