after the second dose she felt fine and everything cleared up, she felt better; sleeps all day; down again; had low grade fever again; This is a spontaneous report from a contactable consumer or other non hcp (patient) and physician via medical information team. A 75-year-old female patient received second dose of bnt162b2 (PFIZER BIONTECH COVID-19 VACCINE, solution for injection, lot Number: EN6198), via an unspecified route of administration on 24Feb2021 (at the age of 75-year-old) as dose 2, single for COVID-19 immunization. Medical history included myasthenia gravis (misdiagnosed with a brain disorder, Myasthenia Gravis and she was taking medications for it), she was in bad shape at that time, abdominal pain from an unknown date and unknown if ongoing went to the ER, had pain in the abdomen (went to the ER, had pain in the abdomen, had a CT scan and was in the ER for over 8 hours), always running a low grade fever, had all kinds of infection with head and lung, compromised condition, COPD, depression, hasn't been able to walk around. The patient's concomitant medications were not reported. The patient historical vaccine included first dose of bnt162b2 (PFIZER BIONTECH COVID-19 VACCINE, solution for injection, lot Number: EL9265), via an unspecified route of administration on 27Jan2021 (at the age of 75-year-old) as dose 1, single for COVID-19 immunization; pyridostigmine for myasthenia gravis and experienced killing her (feeling abnormal) on Oct2018 to Oct2020. On an unspecified date in 2021, the patient experienced down again, had low grade fever again, sleeps all day. On 26Feb2021, the patient experienced after the second dose she felt fine, and everything cleared up, she felt better, wonderful. Patient stated that she received the first dose of the Pfizer COVID-19 vaccine last 27Jan2021, the second dose on 24Feb2021 and the booster dose on 11Oct2021. Patient stated that before receiving the vaccine, she was misdiagnosed with a brain disorder, Myasthenia Gravis and she was taking medications for it. Patient also stated that she was in bad shape at that time, went to the ER, had pain in the abdomen, had a CT scan and was in the ER for over 8 hours and was waiting for an ambulance to withheld when they thought she was going to have a massive respiratory failure. Serious stuff was going on before her second dose of the Pfizer COVID-19 vaccine. She also stated that she was always running a low-grade fever and had all kinds of infection with head and lung. Patient stated that after the second shot of the Pfizer COVID-19 vaccine, it was like within 2 days, on the second day after her shot, she was fine and everything cleared up and that she felt better, wonderful, she was able to breathe better after the shot. Patient also stated that it took away her depression. Patient stated that gradually she got back to her bad health, that naturally back in February, everything came back again. Patient stated that she was down again, had low grade fever again and that her primary care physician was trying to look into that. Then, when she had the booster dose, the same thing happened, she never felt better in several years and that 48 hours later or yesterday, she was able to drive a tractor, mowed the grass, and she felt so much better and felt like doing things. Patient stated that she hasn't been able to walk around or drive and sleeps all day before the booster dose. Patient stated that she hasn't felt this good with the Pfizer COVID-19 vaccine. She also stated that she felt like a human being again and that it turned everything around again. Patient stated that Pfizer makes her well and wanted to know when she can receive another dose as she nearly died 2 to 3 times before it. Patient asked where she can get more information about the Pfizer BioNTech COVID-19 vaccine. The patient taking Covid 19 vaccine because it was time, compromised condition, COPD, physical condition, 75, had such good reaction to second. Patient reported she received the first Pfizer Covid 19 dose on 27Jan2021, the second one on 24Feb2021, and the booster on 11Oct2021. States during her second dose something strange happened to her and really important to her. Stated prior to any Covid 19 vaccines she was diagnosed with a brain disorder and she was in bad shape at that time and they brought her to the emergency room. Had pain in her abdomen, a CT scan was done and she was in the emergency room for over 8 hours. She had also been transferred with the ambulance to withheld because they thought she was going to have massive respiratory failure. Was taking medication for those conditions. Stated after the second dose, it was like 2 days after she felt better. States before the second dose she was always running a low-grade fever and had all kinds of infection with the head and lungs, but after the second dose she felt fine and everything cleared up, she felt better, wonderful. She breathes better and it took away her depression and she gradually had better health and then after that she got back to having good health. Then they started to come back again. She went for the booster shot and after the booster shot she felt better, even better than she had in several years. Before the vaccines she hasn't been able to walk around or drive, but yesterday since she has had the booster she has been able to drive a tracker, mow the grass. She felt so much better and she hasn't felt this good. She felt like a human being again. Prior to any Covid 19 vaccines she was misdiagnosed with myasthenia gravis and nearly died 2-3 times before, but the Pfizer vaccines made her well. Stated that after her second shot she wanted to report how she was doing, but it only had where you can put ill effects and she didn't have any ill effects. She had wonderful effects and it wouldn't take her information. So, when it happened the second time after the booster shot, it did it again and she thought Pfizer should know about how well it did for her. Whatever is in that shot can fix whatever the doctors can't fix with her condition and she felt that Pfizer needs to know more about it. She hadn't felt this good in a long time and then it started going down again over time, so maybe Pfizer can come up with something that would keep her going. Received his first dose on 27Jan2021 and provides lot number of EL9265 and the second dose on 24Feb2021 and provides the lot number of EN6198. Receives the booster vaccine on 11Oct2021 and provides the lot number of FC3181 and states the 8 could also be a letter B, it's hard to read on the card. Unable to provide the NDC, expiry, or strength for any of the Covid 19 vaccines. No other vaccines given the same day or 4 weeks prior. No problems with vaccines in the past. Had such a wonderful effect from the second one that she was not going to miss the booster. Patient clarifies events that were prior to any Covid 19 vaccines and states the medication to treat the conditions were also prior to any vaccines and she no longer takes it. Had been on it since Oct2018 and last took it Oct2020. This was all when she was misdiagnosed and given pyridostigmine. Came to find out that this medicine was killing her and she was misdiagnosed. Unable to provide NDC, Lot, or expiry for product. Had some bloodwork done because they are trying to track down her thyroid and that was done at Withheld. Phone Out 02:00 PM EST, 1st attempt by phone to HCP to obtain mailing information. Phone answered by the receptionist (name not provided) who provided the Physician's mailing address and fax number. The patient underwent lab tests and procedures which included blood work, CT scan, track down her thyroid, all tests result unknown on an unspecified date in 2021. The clinical outcome of all the events was unknown.