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COVID-19 Vaccine Lots

For Pfizer, Moderna and Janssen(J&J) vaccines.

Are some batches of Covid-19 vaccines more dangerous than others? Previously it was impossible to determine the Serious Adverse Event (SAE) rate by lot number because we did not know the total number of doses in the lot ("the denominator"). So the Informed Consent Action Network via the extraordinary attorneys Siri & Glimstad LLP used the Freedom of Information Act to obtain from the CDC the full data set of doses shipped in the US and territories by lot number. As you will see below, we can now confirm that some batches of Covid-19 vaccines are significantly more dangerous than others. 

To find out more about the lot data and how it was prepared-read our FAQ.

You can also search the data yourself by lot number or state. 

"All SAE's" are defined as: ER visits, hospitalizations, permanent disability, life threatening, deaths and birth defects.

Where we use Date this means: First date shipped. In most cases all shipments occurred within 2-4 weeks. In a few cases the lots shipped in under 4 months.

On the scatterplot charts you can click on the colored legends to turn them on and off and see a manufacturer's lot data in isolation.

Lot Size Distribution

Doses ShippedPfizerModernaJanssen
Doses Shipped: Under 10,000
Pfizer: 1
Moderna: 5
Janssen: 2
Doses Shipped: 10,000-50,000
Pfizer: 3
Moderna: 10
Janssen: 1
Doses Shipped: 50,000-100,000
Pfizer: 1
Moderna: 5
Janssen: 4
Doses Shipped: 100,000-500,000
Pfizer: 6
Moderna: 32
Janssen: 13
Doses Shipped: 500,000-1,000,000
Pfizer: 19
Moderna: 84
Janssen: 14
Doses Shipped: 1,000,000-11,000,000
Pfizer: 154
Moderna: 14
Janssen: 14

source: OpenVAERS.com

source: OpenVAERS.com

 

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

 

source: OpenVAERS.com

 

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

source: OpenVAERS.com

* The scatterplots for this page were inspired by the work of Craig Paardekooper at https://howbadismybatch.com/ who analyzed the first incomplete batch of vaccine lot information in July 2022. 

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