Myalgia, headache, fatigue and rhinitis were reported by 19/119 (=16.7%), 40/119 HCWs (=33.6%), 38/119 (=31.9%) and 30/119 (=25.2%) IgA-seropositive HCWs, while they were present in 119/894 (=13.4%), 364/894 (=40.7%), 312/894 (=34.9%) and 241/894 HCWs (=27%) who were found anti-SARS-CoV-2 IgA-negative, respectively. Here, CD79A is linked to rhinitis.