For those interested in covid vaccine reactogenicity...
from CDC web site based upon data from trials supporting EUA:
Local Reactions, Systemic Reactions, Adverse Events, and Serious Adverse Events: Moderna COVID-19 Vaccine:
https://www.cdc.gov/vaccines/covid-19/info-by-product/moderna/reactogenicity.html
Local Reactions, Systemic Reactions, Adverse Events, and Serious Adverse Events: Pfizer-BioNTech COVID-19 Vaccine
https://www.cdc.gov/vaccines/covid-19/info-by-product/pfizer/reactogenicity.html
Some things to note:
This data comes from trials and subsequently from the FDA briefing sheets, and there are links to these at both sites.
Everything is based on subject (patient) reporting. Information on the specifics of trial forms, instructions and procedures for collection of these data and for reducing the pools into useful information is ilkely in the public domain.
Comparisosn are between vaxed and placebo (placebo control). Also remember these studies were blinded.
Tables 3 and 4 provide systemic reaction information (64 and under and 65+). Note the sizes of the data sets.