my ferritin is a 3, almost undetectable. The hematologist gets concerned under 30, normal can be up to 300. It will take month to see the recovery. I will let you know, first iron infusion is Wednesday. And what worse, is I have to go through a prep and endoscopy and colonoscopy to prove there is no internal bleeding. I have no GI pain, no occult blood. So maybe it is the long-haul effect of covid on the gut. Because it affected abdominal symptoms terrible for me for 9 month. But I have been normal now for 9 month and ferritin continues to drop.