In individuals receiving COVID-19 mRNA vaccines, increased levels of innate cytokines and chemokines such as CXCL9, CXCL10, CXCL11, IFN-γ, and CCL20 have been identified in the peripheral blood of adults, with CCL20 and IFN-γ showing the strongest correlation with post-vaccination symptoms [11]. This evidence concerns the gene CCL20 and COVID-19.