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Transparent access to VAERS data for informed decision-making. We present the data as-is, with appropriate context and disclaimers.

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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. Personality change
Tdap (Boostrix)×Personality change

Personality change Reports for Tdap (Boostrix)

#811 most reported symptom for this vaccine

17
Reports
0
Deaths
3
Hospitalizations
0
Mortality Rate
%
17.6
Hosp. Rate
%

Personality change and Tdap (Boostrix)

Personality change has been reported 17 times in association with Tdap (Boostrix) vaccination in VAERS. This represents 0.0% of all 52,846 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 3 involved hospitalization (17.6%).

Personality change is the #811 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 17 reports of Personality change 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 Personality change occurred after vaccination, not that the vaccine caused it.
•Background rates: Personality change 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

Specific gravity urine normal17 reportsNeck mass17 reportsTachypnoea17 reportsCentral nervous system lesion17 reports

Quick Facts

Reports:17
Deaths:0
Hospitalizations:3
% of Vaccine:0.0%
Rank:#811 of 2243

Related Pages

Tdap (Boostrix) OverviewPersonality change (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.