I got two doses of the Moderna vaccine, the last one in April. I have no history of iron deficiency or anemia. On June 2, I was admitted to the hospital with extremely low iron and anemia. I was given two pints of blood over two days. I was not aware of losing blood. I was given two endoscopies and a colonoscopy--all three were normal. None of my health care practitioners could figure out why I was suddenly experiencing these problems. I had two iron infusions after hospitalization. I have since had a blood test to determine if my iron anemia problem was solved, and it appears so. Initially, I didn't link the problem with the vaccines, but I now suspect there may be a correlation.