CD79A and COVID-19: A recent report underscored the possibility that cytokine and autoantibody levels in peripheral blood may not necessarily reflect the situation in tissues that are relevant for the post‐COVID‐19 syndrome: Transient IgA‐type anti‐IFN‐alpha antibodies in the nasal epithelium, but not its IgG type counterpart in blood, were correlated with improved recovery from COVID‐19 [43].