key: cord-1043036-ifdm2x0e
authors: Munguía‐Calzada, Pablo; Drake‐Monfort, Marta; Armesto, Susana; Reguero‐del Cura, Leandra; López‐Sundh, Ana Elisabet; González‐López, Marcos Antonio
title: Psoriasis flare after influenza vaccination in Covid‐19 era: A report of four cases from a single center
date: 2020-12-22
journal: Dermatol Ther
DOI: 10.1111/dth.14684
sha: c676a621b9d400674ddf76c39c919e7993d762b6
doc_id: 1043036
cord_uid: ifdm2x0e

nan

Psoriasis is a chronic inflammatory disease affecting 1% to 3% of the world's population 1, 2 and results from the interaction between genetics and environmental factors such as stress, infections, and drugs, causing a T-cell-mediated response. [1] [2] [3] Vaccination is an uncommon triggering factor for the flare-ups of several skin diseases, 2,4-6 and a potential association between vaccination and the onset or exacerbation of psoriasis has been previously documented. 2, [5] [6] [7] In this letter, we report four new cases of psoriasis flare-ups after an influenza vaccination ( Table 1 ).

The first patient was a 41-year-old man with chronic plaque psoria- 

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