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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. MedImmune

MedImmune

13,362 total reports0.5% market share
13,362
Total Reports
84
Deaths
925
Hospitalizations
3
Vaccines

About MedImmune

MedImmune has 13,362 adverse event reports in VAERS, representing 0.5% of all manufacturer-attributed reports.

Of these reports, 84 mentioned death and 925 involved hospitalization.

MedImmune produces 3 vaccines tracked in VAERS. Their relatively low report count reflects a smaller market presence or specialized vaccine portfolio.

Vaccines by MedImmune

VaccineReportsDeathsHospitalizations
FLUN36,37731481
FLUN43,37315136
FLUN(H1N1)3,00014144

Understanding Manufacturer Data

•Market presence matters: More reports often reflect more doses distributed, not necessarily more safety issues.
•Reporting varies: Newer vaccines and those under heightened scrutiny tend to have higher reporting rates.
•All manufacturers meet FDA standards: Safety and efficacy requirements apply equally to all approved vaccines.

Top Vaccines

1. FLUN36,739
2. FLUN43,467
3. FLUN(H1N1)3,156

Explore Further

Top Vaccine: FLUN3All ManufacturersManufacturer LandscapeCompare Vaccines

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.