Where do we get our data?

VaxCalc obtains ingredient amounts from FDA-approved vaccine package inserts.  The single exception is glyphosate, for which we use independent research as the data source.  Toxicity and tumorigenicity information on some ingredients is obtained from the CDC, FDA, various state health agencies and published research.

VaxCalc pulls data from CDC's National Notifiable Diseases Surveillance System, Weekly Tables of Infectious Disease Data, from the CDC Division of Health Informatics and Surveillance. CDC acknowledges the Local, State, and Territorial Health Departments that collected the data from a range of case ascertainment sources (e.g., health-care providers, hospitals, laboratories) and reported these data to CDC's National Notifiable Diseases Surveillance System.
VaxCalc pulls vaccine adverse reaction data from Vaccine Adverse Event Reporting System: VAERS is co-sponsored by the Centers for Disease Control and Prevention (CDC), and the Food and Drug Administration (FDA), agencies of the U.S. Department of Health and Human Services (HHS).

When interpreting vaccine reaction data, keep in mind that according to the CDC "under-reporting is often a problem." Only about 1-10 percent of vaccine reactions are believed to be reported.  VaxCalc recommends reading this FDA presentation on the strengths and limitations of VAERS data. 

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