It appears that the CDC could have required the big drug companies to collect and keep this data but failed to do this. It appears that there are those at the CDC who are quite concerned and frustrated with this failure.
Our tutorial methods paper on how to quickly detect vaccine and drug adverse reaction, with Ivair Silva and Judy Maro.https://onlinelibrary.wiley.com/doi/10.1002/sim.9094 …
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