there is some muscular weakness; he still has minor symptoms, but that's a big leap./all his symptoms went away for the first time/noticed he was walking better at first/other muscles started to get stronger/noticed his face started to improve; This is a spontaneous report received from a contactable consumer (patient, self-reported). A 57-year-old male patient received second dose of BNT162B2 (PFIZER-BIONTEC COVID-19 mRNA VACCINE, Solution for injection, lot number: EW0158 and expiry date was not reported), via an unspecified route of administration, in Arm Left, on 12Apr2021 at 13:00, as a single dose for COVID-19 immunization. The patient received first dose of BNT162B2 (PFIZER-BIONTEC COVID-19 mRNA VACCINE, Solution for injection, lot number: ER8732 and expiry date was not reported), via an unspecified route of administration, in Arm Left, on 22Mar2021 at 13:00, as a single dose for COVID-19 immunization. The patient took Pfizer Covid Vaccine because to not get COVID. Vaccine was administered. The patient's medical history included ongoing myasthenia gravis from 2015, ongoing eyelid ptosis, ongoing Sero negative (they haven't discovered the antibody that causes his symptoms), malignant thymoma (malignant tumor in the thymus) and autoimmune disease. Historical vaccine included Flu shot and patient had weakness and tired. He thought it was a normal reaction. The family medical history Relevant to adverse events were reported as none. Concomitant medications were not reported. The patient did not receive any other vaccines within 4 weeks prior to the covid vaccine. Prior to vaccination, the patient was not diagnosed with covid-19. Since the vaccination, the patient not been tested with covid-19. The patient stated that he has been struggling with an autoimmune disease for 6 years and after he got the COVID shot, all his symptoms went away for the first time. He hasn't not had a symptom for 6 years, and he thought Pfizer would want to know. The patient stated he's been reading about it, the RNA messenger could be effective for auto immune diseases and he has been severely ill in a wheelchair and walker and he's walking on his own now and doing all kinds of things he's never done before. He didn't know for sure if it's the shot, but it's awful coincidental. He still had minor symptoms, but that's a big leap. Caller states shortly after the first shot is when he noticed a different and after the second one, he was in the state he's currently in. There was some muscular weakness, but it was not a lot. It was a big change from being in a wheelchair to walking. The patient just noticed he was walking better at first and other muscles started to get stronger. It's a disease that affects all voluntary muscles, so all his muscles were affected. Eventually he noticed his face started to improve. He had ptosis, dropping of the eyelid, and that started to go up. His facial muscles improved, his arms. He stated every voluntary muscle had improved. He has noticed changes pretty much all over his body. There was no Investigation Assessment. The events did not require a visit to emergency room and physician office. The relevant tests were reported as none. Outcome of the events was unknown.