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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. Smallpox (Acam2000)
  4. Electrocardiogram ST segment depression
Smallpox (Acam2000)×Electrocardiogram ST segment depression

Electrocardiogram ST segment depression Reports for Smallpox (Acam2000)

#446 most reported symptom for this vaccine

16
Reports
0
Deaths
14
Hospitalizations
0
Mortality Rate
%
87.5
Hosp. Rate
%

Electrocardiogram ST segment depression and Smallpox (Acam2000)

Electrocardiogram ST segment depression has been reported 16 times in association with Smallpox (Acam2000) vaccination in VAERS. This represents 0.2% of all 8,768 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 14 involved hospitalization (87.5%).

Electrocardiogram ST segment depression is the #446 most frequently reported symptom for Smallpox (Acam2000) out of 1393 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 16 reports of Electrocardiogram ST segment depression after Smallpox (Acam2000) 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 Electrocardiogram ST segment depression occurred after vaccination, not that the vaccine caused it.
•Background rates: Electrocardiogram ST segment depression 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

Treponema test negative16 reportsVaccination site pustule16 reportsNervousness15 reportsEye swelling15 reports

Quick Facts

Reports:16
Deaths:0
Hospitalizations:14
% of Vaccine:0.2%
Rank:#446 of 1393

Related Pages

Smallpox (Acam2000) OverviewElectrocardiogram ST segment depression (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.