I do not understand how there isn't any information on this or even a study being done. I am an individual that has had the Pfizer vaccine. I have had issues with my iron levels since. I also know another mother and daughter that has the same story I do and she works with someone that has had the same issue. I do not know many people since I moved to this area. But this is small group of people that I have spoken to has the same issue. Now we are all different ages, all different medical issues, but we are all females. I am the oldest out of the other 3, I am 56 years old. I do not think anybody is doing any kind of study on it because they are not relating the iron issues to the vaccine. I have always had higher than adult mans iron levels than I had the vaccine. Poor absorption and low levels of iron. I take iron supplements everyday. I was in so much pain in my feet & legs and was so fatigued I couldn't function. Once I started the supplements it took time but the pain in my feet and legs started to feel better and I started to get more energy.