CD79A and rheumatoid arthritis: aβ2GPI‐IgA have also been observed in many autoimmune diseases (AID) other than APS including rheumatoid arthritis (RA),13 autoimmune hepatitis,14 celiac disease,15 primary biliary cholangitis,16 and in infectious diseases like hepatitis C17 and coronavirus disease 2019 (COVID‐19).18