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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. Anthrax (Biothrax)
  4. Muscle spasms
Anthrax (Biothrax)×Muscle spasms

Muscle spasms Reports for Anthrax (Biothrax)

#49 most reported symptom for this vaccine

228
Reports
3
Deaths
39
Hospitalizations
1.32
Mortality Rate
%
17.1
Hosp. Rate
%

Muscle spasms and Anthrax (Biothrax)

Muscle spasms has been reported 228 times in association with Anthrax (Biothrax) vaccination in VAERS. This represents 2.0% of all 11,622 reports for this vaccine.

Among these reports, 3 mentioned death (1.32%) and 39 involved hospitalization (17.1%).

Muscle spasms is the #49 most frequently reported symptom for Anthrax (Biothrax) out of 1624 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 228 reports of Muscle spasms after Anthrax (Biothrax) vaccination may seem alarming, but context is critical.

The mortality rate of 1.32% warrants monitoring, though VAERS deaths represent temporal associations, not confirmed causal links.

Important Context

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

Laboratory test abnormal250 reportsAbdominal pain238 reportsMyocarditis226 reportsInjection site pruritus223 reports

Quick Facts

Reports:228
Deaths:3
Hospitalizations:39
% of Vaccine:2.0%
Rank:#49 of 1624

Related Pages

Anthrax (Biothrax) OverviewMuscle spasms (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.