Psoriasis flare after influenza vaccination in Covid-19 era: A report of four cases from a single center

摘要

Dear Editor, Psoriasis is a chronic inflammatory disease affecting 1% to 3% of the world's population and results from the interaction between genetics and environmental factors such as stress, infections, and drugs, causing a T-cell-mediated response. Vaccination is an uncommon triggering factor for the flare-ups of several skin diseases, and a potential association between vaccination and the onset or exacerbation of psoriasis has been previously documented. In this letter, we report four new cases of psoriasis flare-ups after an influenza vaccination (Table 1).