Here are some useful links:

Vaccine Adverse Event Reporting System (VAERS)
Government Disclaimer on Use of VAERS data
CDC WONDER (CDC)
VAERS Overview (The Food and Drug Administration)
Vaccine Safety (CDC)
Vaccine Safety Datalink (CDC)
V-safe After Vaccination Health Checker for COVID-19 Vaccine (CDC)
What VAERS Is (And Isn’t) (Johns Hopkins Bloomberg School of Public Health)
Diseases & the Vaccines that Prevent Them
Virtual Assistant