Vaccine had stayed in his arm and it had not penetrated and gone into the blood so it was in one puddle on his arm and that had shot through his arm and into his chest like a bullet; Chest and arm are very blistered in the arm pit; Arm is getting very weak and tired; Has weird sensations where the shot was and they are always different ones and nothing sets them off that he knows of; It still hurts, his arm hurts all the time and it is burning like a blister sensation in his arm pit and it is all the time; It ripped his skin, that's how much pressure there was.; Booster dose; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 70 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 20Oct2021 (Lot number: FF8839) at the age of 70 years as dose 3 (booster), single for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: Bnt162b2 (Dose1, Lot Number: EJ1685, Unknown expiry date, Route, Anatomical Location: Left arm), administration date: 13Jan2021, when the patient was 69 years old, for COVID-19 immunization, reaction(s): "No reaction on previous exposure to vaccine"; Bnt162b2 (Dose2, Lot Number: E13246, Unknown expiry date, Route, Anatomical Location: Left arm), administration date: 17Feb2021, when the patient was 69 years old, for COVID-19 immunization, reaction(s): "No reaction on previous exposure to vaccine". The following information was reported: IMMUNISATION (non-serious) with onset 20Oct2021, outcome "unknown", described as "Booster dose"; FEELING ABNORMAL (non-serious) with onset Nov2021, outcome "unknown", described as "Vaccine had stayed in his arm and it had not penetrated and gone into the blood so it was in one puddle on his arm and that had shot through his arm and into his chest like a bullet"; BLISTER (non-serious) with onset Nov2021, outcome "not recovered", described as "Chest and arm are very blistered in the arm pit"; MUSCULAR WEAKNESS (non-serious) with onset Nov2021, outcome "unknown", described as "Arm is getting very weak and tired"; VACCINATION SITE DISCOMFORT (non-serious) with onset Nov2021, outcome "not recovered", described as "Has weird sensations where the shot was and they are always different ones and nothing sets them off that he knows of"; BURNING SENSATION (non-serious) with onset Nov2021, outcome "not recovered", described as "It still hurts, his arm hurts all the time and it is burning like a blister sensation in his arm pit and it is all the time"; SKIN LACERATION (non-serious) with onset Nov2021, outcome "unknown", described as "It ripped his skin, that's how much pressure there was.". The events "vaccine had stayed in his arm and it had not penetrated and gone into the blood so it was in one puddle on his arm and that had shot through his arm and into his chest like a bullet", "chest and arm are very blistered in the arm pit", "arm is getting very weak and tired", "has weird sensations where the shot was and they are always different ones and nothing sets them off that he knows of", "it still hurts, his arm hurts all the time and it is burning like a blister sensation in his arm pit and it is all the time" and "it ripped his skin, that's how much pressure there was." were evaluated at the physician office visit.  Additional information: No other vaccinations within four weeks prior to the first administration date of the suspect vaccine. No AE prior to vaccinations. The patient reported that all of his vaccines were done about mid day, usually he went mid day from 11:00 to 12:00 or something like that. About 2 weeks after he leaned over and laid on his left side, where the booster shot was put in, and the vaccine had stayed in his arm and it had not penetrated and gone into the blood so it was in one puddle on his arm and that had shot through his arm and into his chest like a bullet and went down into his chest and into his arm pit. It blistered his arm pit. His chest and arm were very blistered in the arm pit. That's not a normal thing to ask questions about. It still hurts, his arm hurts all the time and it was burning like a blister sensation in his arm pit and it is all the time. It was hard to deal with because he has to live with it and he did not know what he can do to fix it. He did not know of anything that can be done. The patient reported that they can't just cut his chest open and scrape it out. He was stuck with it and he had to live with it. It had been a month now and his arm was getting very weak and tired. He gets weird sensations like one time he felt like something was crawling around at the injection site. He had weird sensations where the shot was and they were always different ones and nothing sets them off that he knew of. He has never experienced anything like that. It ripped his skin, that's how much pressure there was. He went to the doctor a couple days afterwards and the doctor looked at it and there was nothing that he could do. The patient wanted to let Pfizer know about that and he did not know if anything can be done. Maybe someone could tell him what the effects were long term with it being in there long term, like if there were any problems.  Follow-up attempts are completed. No further information is expected.