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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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  3. Dose Series Explorer

Dose Series Explorer

Compare adverse event reports across different dose numbers for any vaccine. See how report patterns change from 1st dose through boosters.

104

vaccines with dose data

Up to 6+

doses tracked per vaccine

Dose 1

typically has most reports

⚠️ Interpreting Dose Data

  • • First doses typically have more reports because more people receive dose 1 than subsequent doses (dropout effect).
  • • Some vaccines show higher 2nd dose reports (like COVID mRNA) — this reflects stronger immune responses, not necessarily greater danger.
  • • "UNK" (unknown) means the dose number wasn't recorded in the VAERS report.
  • • Death rates by dose can be misleading without knowing the total doses administered per series.

Related

→ Dose Comparison Analysis→ Dose Comparison Tool→ Onset Calculator→ COVID Impact Analysis