Multiple drugs: Various toxicities.

This document presents a series of case studies detailing adverse reactions to COVID-19 vaccines in individuals with pre-existing medical conditions. The cases include instances of inflammatory arthritis, autoimmune hemolytic anemia, cutaneous vasculitis, and other conditions. Treatment varied depending on the condition, but most cases showed significant improvement. It is important to note that these cases are rare and do not represent the typical response to COVID-19 vaccination. [Extracted from the article]