Yes. My husband has never had any history of anemia or low iron. He received the Pfizer vaccine in March. He began feeling more tired over the next two months. He saw his physician and she suspected some type of internal bleeding based on the blood test, He had an upper and lower endoscopy. No internal bleeding was found. They are going to try the camera endoscopy next week. We don't think this is going to reveal anything. His iron, ferritin and red blood cell count is extremely low. The only change in has been receiving the vaccine.

No history

I have not been low in iron since I went through the change of life 10 yrs ago. Since then I have been able to give blood without a problem, and my iron is always good there and when I have had blood work done. I had the Pfizer vaccine at the end of May, and have not felt well since, very tired, loss of energy doing the smallest thing. I had a physical a few weeks ago and now I am low in iron, which is concerning to my Dr.

My husband got J&J in April and my 32yr old daughter got Maderna in May. They have always had perfect hemoglobin levels. In the last two weeks their hemoglobin levels were low for the first time. Both started complaining about being tired, no energy and foggy headed after being vaccinated. My husband is a three time Ironman athlete. He's climbed Mt. Kilimanjaro. Now climbing our stairs makes him winded and light headed. I on the other hand am not vaccinated.
It seems to be vaccine related, regardless of which vaccine one received.

I have had this same issue and found this Mayo Clinic thread while searching for some answers. I have chronic IDA due to a genetic disorder called HHT. My Hgb was 8.4 when I got my second Pfizer dose and 2 weeks later I ended up in ER for blood transfusion with hgb at 6.6.

I just got my booster a week ago and hgb dropped from 9.1 to 7.3. I have absolutely no doubt now that this is due to the vaccine.

I am a hospital worker interacting with Covid patients all week so I am still very happy to be vaccinated but this drop in blood and iron levels is pretty scary. Can you please give some explanation why this may be happening? I thought perhaps it triggered a HHT related bleed but now t that I see all these people with similar issues I am curious what is going on??

Thank you for any insight.

Best, Kari

I have never had a problems with my blood or anemia. 2 months after receiving the Pfizer vaccine I went to my primary care Dr. and she had blood tests done. That afternoon I was contacted by her office stating that I needed to go to the emergency room immediately since my hemoglobin count was 5.3. I was admitted and they did an upper GI and colonoscopy and found no bleeding or problems. They gave me iron treatments & 2 transfusions and I was released. After 3 weeks on iron, B12 and folic acid my hemoglobin is 12.2. My brother, who lives 60 miles from me had the same exact experience! I also know of two other individuals with the same drop in hemoglobin after the Pfizer covid vaccine. There has to be some connection.

The same thing happened to me but with the Moderna vaccine. I am a healthy, half-marathon runner. The day after the first dose, I could not walk a mile. The second dose made me really sick, stuck on the couch for 4 days. I hadn’t been running much due to time restrictions so the anemia was not due to running. I signed up for a marathon and started practicing but my legs felt so heavy and I could not breath. I was having trouble sleeping, heart palpitations, tired throughout the day, and could not do all the activities I used to in a day. It also made me foggy-headed at times. I noticed my lymph nodes were swollen as well, and still are to this day, 7 months after my first dose. I’m August, I started going to my see my doctor and have had multiple blood tests, which confirmed iron deficiency and also high immunoglobulin M. I had an endoscopy/colonoscopy to rule out internal bleeding. I had an ultrasound on my lymph nodes and am now doing a CT on them. My ferritin is still low, my red blood cells are too wide now, and my TIBC is too high, and my IGM still too high as well. I have my energy back but still have a hard time with my breath running less than a mile. When I tell people it happened right after the vax, they always want to try to find another explanation, even my docs who try to point to birth control when I’ve been on bc for 20 years so that answer makes no sense. This needs to be looked into and taken seriously, there is something here….

I am going through the same thing. Vaccines in March and April with no history of anemia. I donate blood regularly and when I went to donate in mid-May my hemoglobin was low. I upped my iron-rich food and added iron supplements.

When I went back at the end of May to donate my hemoglobin was high enough to donate but I ended up in a cold sweat and passing out while donating. My PCP sent me to Gastro, I had an Endoscopy, colonoscopy, camera endoscope and they found nothing.

My doctor says my CBC looks like I stopped eating red meat entirely, which I have not done at all, I love red meat. I am now prone to dizziness even with iron supplements. I cannot do a lot of things I used to do because I am always short of breath now.

For the first few weeks after the blood donation, I would get dizzy and just blackout, so much so my husband wouldn't let me drive. I can drive some now, staying close to home, on surface streets with a speed limit under 35. Thankfully I can get to work and within those limitations and all my shopping is done online and delivered now so I do not blackout in public.

Received Pfizer vaccine Feb 2021. Experiencing low Hgb,low iron, low ferritin, anemia, high blood sugar. No history of anemia.

No history of anemia or other blood disorder.. Since receiving vaccine my HGB has dropped from 13 to 9, and ferritin and iron dropped below normal. A1C also changed from 6.5 and gradually increasing to 8.1. Doctors have no explanation or causes. Only thing that changed was receiving Pfizer vaccine.