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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.

⚠️

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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VAERS Reporting Timeline

35 years of vaccine adverse event reporting (1990–2026). Track how reporting patterns have changed over time — from the early days of VAERS through the COVID-19 pandemic and beyond.

1990

VAERS established

37

years of data

2021

peak reporting year

768K

reports in 2021

⚠️ Understanding Reporting Trends

  • • More reports ≠ more danger. The 2021 spike reflects COVID-19 vaccine rollout to hundreds of millions of people, plus heightened public awareness.
  • • Reporting awareness changes over time. Public health campaigns, media coverage, and legal requirements all influence filing rates.
  • • The system is passive. Reports are voluntary, so trends reflect reporting behavior as much as actual adverse events.
  • • Pre-2021 baseline was roughly 30,000-50,000 reports per year for all vaccines combined.

Related Analysis

→ COVID-19 Impact on VAERS→ Reporting Trends Analysis→ Understanding Reporting Bias→ The Denominator Problem