ART4 and rosacea: For rosacea, MR studies have found significant associations with anti‐chlamydia trachomatis IgG seropositivity, EBV EA‐D antibody levels, Human herpes virus 6 IE1B antibody levels, anti‐polyomavirus 2 IgG seropositivity, and varicella zoster virus glycoproteins E and I antibody levels.