They didn't have any side effects with the previous vaccines except maybe just a sore arm at the injection site.; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  An 80-year-old male patient received BNT162b2 (BNT162B2), on 27Apr2022 at 10:00 as dose 4 (booster), single (Lot number: FJ6369) at the age of 80 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "Pacemaker placement", start date: 2021 (unspecified if ongoing); "atrial fibrillation" (unspecified if ongoing). There were no concomitant medications. Vaccination history included: BNT162b2 (Dose: 01 , Manufacturer: Pfizer, NDC: Unknown , LOT: EL3249 , EXP: May2021 , Dose and Route: injected into left arm; dose amount unknown , Time: 7PM), administration date: 18Jan2021, when the patient was 78-year-old, for COVID-19 immunization; BNT162b2 (Dose: 02, Manufacturer: Pfizer, NDC: Unknown , LOT: EN9581 , EXP: May2021 , Dose and Route: injected into left arm; dose amount unknown , Time: 10AM), administration date: 08Feb2021, when the patient was 78-year-old, for COVID-19 immunization; BNT162b2 (Dose: 03, Manufacturer: Pfizer, NDC: Unknown , LOT: EW0185 , EXP: Unknown , Dose and Route: injected into left arm; dose amount unknown , Time: 8AM-9AM), administration date: 11Oct2021, when the patient was 79-year-old, for COVID-19 immunization; Shingles (Had all vaccines, from shingles to whatever), for immunization. The following information was reported: VACCINATION SITE PAIN (non-serious), outcome "unknown", described as "They didn't have any side effects with the previous vaccines except maybe just a sore arm at the injection site".  Additional Information: It was reported that He and his wife experienced the same situation. They have gotten two of the bivalent boosters for Pfizer COVID-19 vaccine. They had the first shot Jan2021 A second shot in Feb2021 A booster later in the year, 2021 Then a fourth dose in Apr2022. Both got a bivalent COVID-19 Vaccine on 09Sep2022 and a bivalent COVID-19 Vaccine again today 19Jan2023 They didn't have any side effects with the previous vaccines except maybe just a sore arm at the injection site. Clarifies there was only supposed to be just one bivalent dose given. All previous doses were manufactured by Pfizer, and they had no other negative reactions to any of them. Had all vaccines, from shingles to whatever. Took first bivalent COVID-19 Vaccine on 09Sep2022. Today when having their annual wellness, primary visit with primary doctor, their doctor said the new variant COVID-19 Vaccine was out and their doctor took it. Their doctor states that caller and his wife are always staying current that maybe they wanted to get the new variant COVID-19 Vaccine. Reporter and his wife took the variant COVID-19 Vaccines today, went home, looked at their cards, to find out it was the same bivalent COVID- 19 Vaccine. He has noticed references to heart issues, and he has a pacemaker. Pacemaker placed: sometime in the year of 2021, but he had issues before the COVID-19 vaccines More recently he had atrial fibrillation and was given two medications. The atrial fibrillation was light, so they didn't want to shock his heart. Appears the atrial fibrillation was gone. Atrial fibrillation: had symptoms of that at night before receiving the COVID-19 vaccines. Thought muscles were twitching before they discovered it was tied in with the heart. When he would lay on his left shoulder, it felt like a light vibration. He was given the pacemaker, then had Atrial fibrillation, then given the medicine to take care of it.