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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.

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  2. Vaccines
  3. COVID-19 Vaccine
  4. Blister
COVID-19 Vaccine×Blister

Blister Reports for COVID-19 Vaccine

#217 most reported symptom for this vaccine

3,424
Reports
25
Deaths
172
Hospitalizations
0.73
Mortality Rate
%
5
Hosp. Rate
%

Blister and COVID-19 Vaccine

Blister has been reported 3,424 times in association with COVID-19 Vaccine vaccination in VAERS. This represents 0.3% of all 1,121,388 reports for this vaccine.

Among these reports, 25 mentioned death (0.73%) and 172 involved hospitalization (5.0%).

Blister is the #217 most frequently reported symptom for COVID-19 Vaccine out of 9223 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 3,424 reports of Blister after COVID-19 Vaccine vaccination may seem alarming, but context is critical. With 1,121,388 total reports for this vaccine (representing many millions of doses), Blister appears in only 0.3% of reports.

The mortality rate among these reports is very low at 0.73%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Blister occurred after vaccination, not that the vaccine caused it.
•Background rates: Blister 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

Menstrual disorder3,520 reportsMental status changes3,486 reportsBlood glucose normal3,402 reportsMuscle twitching3,383 reports

Quick Facts

Reports:3,424
Deaths:25
Hospitalizations:172
% of Vaccine:0.3%
Rank:#217 of 9223

Related Pages

COVID-19 Vaccine OverviewBlister (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.