How We Analyze Safety Data

Vaccination-Facts.com is committed to transparent, evidence-based analysis of vaccine safety data. This page documents our methodology so readers can understand how we source, analyze, and present information.

Our Data Sources

We rely on primary, authoritative sources for vaccine safety data:

• Government surveillance systems: VAERS, VSD (CDC), BEST (FDA), EudraVigilance (EMA), Yellow Card (UK MHRA)
• Regulatory agencies: FDA, CDC, WHO, EMA, national health authorities
• Peer-reviewed literature: Published epidemiological studies, clinical trials, systematic reviews
• Primary sources: Package inserts, clinical trial data, regulatory filings
• Advisory committees: ACIP (US), JCVI (UK), PRAC (EU), GACVS (WHO)

Our Analytical Standards

Evidence Hierarchy

We present information according to the strength of evidence:

1. Established causal relationship: Confirmed by multiple high-quality studies and regulatory consensus
2. Probable/likely association: Evidence suggests causality but requires further study
3. Inadequate evidence: Available studies are insufficient to draw conclusions
4. Evidence against association: Studies show no increased risk

Critical Context We Always Provide

• Absolute vs. relative risk: We present absolute risk (cases per million) not just relative increases
• Background rates: We compare vaccine-associated risks to natural disease risks
• Limitations of data: We clearly state what surveillance systems can and cannot establish
• Regulatory consensus: We note when agencies have made formal determinations

What We Will Not Do

• Present raw VAERS counts as incidence rates — VAERS cannot establish causation or calculate risk
• Omit context about risk magnitude — We always provide absolute risk data
• Present unverified claims as established facts — We distinguish signals from confirmed associations
• Ignore benefits when discussing risks — Risk-benefit context is essential for informed decisions

Conflict of Interest Disclosure

• Vaccination-Facts.com receives no funding from pharmaceutical companies
• We do not accept advertising from vaccine manufacturers
• Our funding comes from independent charitable sources
• Our editorial team has no financial relationships with pharmaceutical companies

Updates and Corrections

• We regularly update pages as new data becomes available
• When new evidence changes our understanding, we note the update clearly
• We correct errors promptly and transparently
• All content is reviewed for accuracy before publication

Contact

If you have questions about our methodology or believe we have made an error, please contact us.