The impact of SARS-CoV2 viral infection on PsA flares was evaluated.<h4>Results</h4>CD45+HLA-DR+CD123+CD303+CD11c- entheseal pDCs were more numerous than blood pDCs (1.9 ± 0.8% vs 0.2 ± 0.07% of CD45+ cells, p=0.008) and showed inducible IFNα and TNF protein following ODN/imiquimod stimulation and were the sole entheseal IFNα producers. The gene discussed is CLEC4C; the disease is viral infectious disease.