My first try at participation in this chat. No, I do not claim official diagnosis of autoimmune disease due to Covid. What I am trying to learn: is there a connection to my covid19 Pfizer vaccine and subsequent diagnosis approx two months later with CHF and severe anemia for which I required hospitalization. Furthermore, after treatment which included two IV infusions of iron, my blood labs rebounded but now have taken another nose dive. This is all despite a complete worrkup by gastroenterology which showed no GI bleeding and nephrology which showed my lab readings had returned to near normal. I am an octogenarian who has never had this anemia problem before.