Background
Currently, four vaccines for COVID-19 have been licensed by the European Medi-cines Agency: viral vector-based vaccines (AstraZeneca; AZD1222 and Johnson & Johnson; Ad26.COV2. and 2 mRNA-based vaccines (Pfizer/BioNTech; BNT162b2 and Moderna; mRNA-1273). Since their approval, several cutaneous reactions related to vaccination have been reported in the literature. Among these, viral reactivations are one of the most frequent.
Objectives
The aim of this manuscript was to investigate current literature regarding viral reactivations following COVID-19 vaccination, focusing the attention on Pityriasis Rosea, Herpes Zoster and Herpes Simplex.
Methods
A comprehensive literature research using various databases, including metanalyses, re-views, letters to the editor, real-life studies, case series, and reports, was performed.
Results
A total of 47 articles involving about 2000 patients were selected. Of these, 32, 6 and 17 articles reported VZV reactivation (1,758 cases), HSV (238 cases) onset and PR (71 cases), respectively.
Conculsion
Possible pathogenetic mechanisms underlying viral reactivation are not still understood as well as the possible correlations between vaccination and viral reactivation should be clarified. Certainly, vaccination should not be discouraged.