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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. Smallpox (Acam2000)
  4. Cardiac failure
Smallpox (Acam2000)×Cardiac failure

Cardiac failure Reports for Smallpox (Acam2000)

#564 most reported symptom for this vaccine

11
Reports
1
Deaths
3
Hospitalizations
9.09
Mortality Rate
%
27.3
Hosp. Rate
%

Cardiac failure and Smallpox (Acam2000)

Cardiac failure has been reported 11 times in association with Smallpox (Acam2000) vaccination in VAERS. This represents 0.1% of all 8,768 reports for this vaccine.

Among these reports, 1 mentioned death (9.09%) and 3 involved hospitalization (27.3%).

Cardiac failure is the #564 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 11 reports of Cardiac failure after Smallpox (Acam2000) vaccination may seem alarming, but context is critical.

The 9.09% mortality rate among these reports is elevated, but this reflects the severity of the condition itself rather than vaccine causation.

Important Context

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

Stomatitis11 reportsCoordination abnormal11 reportsProtein total decreased11 reportsWhite blood cell count11 reports

Quick Facts

Reports:11
Deaths:1
Hospitalizations:3
% of Vaccine:0.1%
Rank:#564 of 1393

Related Pages

Smallpox (Acam2000) OverviewCardiac failure (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.