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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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MASSIVE DISCLAIMER: Lot numbers with more reports do NOT indicate "bad lots." Larger lots distributed more widely will naturally have more reports. Without knowing lot sizes and distribution patterns, these numbers are meaningless for safety assessment.

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Lot Lookup Tool

Search for specific COVID-19 vaccine lot numbers in VAERS data. Remember: report counts alone cannot determine lot safety without proper context.

4,414
COVID lots tracked
670M+
total doses administered
⚠️
lot sizes unknown
Loading lot number data...

Critical Understanding Required

  • • Higher report numbers usually indicate larger lots or wider distribution
  • • Lot sizes can vary from thousands to millions of doses
  • • Geographic distribution patterns affect reporting rates
  • • Temporal factors (when lots were used) influence reporting
  • • Regulatory agencies monitor lot safety through proper statistical methods