felt a little bit dizzy; get pain in left and right leg; his knees are sore a little bit/feel a little bit pain around the patella; couldn't walk anymore; right leg is really swollen; couldn't sleep; felt a sharp pain with a needle like sensation; right patella is really swollen; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 72-year-old male patient received bnt162b2 omi xbb.1.5 (COMIRNATY (2023-2024 FORMULA)), on 11Oct2023 as dose 1, single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history included: "has problems with knees for years" (ongoing); "has problems with legs for years" (ongoing). The patient's concomitant medications were not reported. Vaccination history included: Covid-19 vaccine (DOSE 1; MANUFACTURER UNKNOWN), for COVID-19 Immunisation, reaction(s): "swelling"; Covid-19 vaccine (DOSE 2; MANUFACTURER UNKNOWN), for COVID-19 Immunisation, reaction(s): "swelling"; Covid-19 vaccine (DOSE 3 (BOOSTER); MANUFACTURER UNKNOWN), for COVID-19 Immunisation, reaction(s): "swelling". The following information was reported: DIZZINESS (non-serious), outcome "unknown", described as "felt a little bit dizzy"; PAIN IN EXTREMITY (non-serious), outcome "unknown", described as "get pain in left and right leg"; ARTHRALGIA (non-serious), outcome "unknown", described as "his knees are sore a little bit/feel a little bit pain around the patella"; GAIT INABILITY (non-serious), outcome "unknown", described as "couldn't walk anymore"; PERIPHERAL SWELLING (non-serious), outcome "not recovered", described as "right leg is really swollen"; INSOMNIA (non-serious), outcome "recovering", described as "couldn't sleep"; PAIN (non-serious), outcome "unknown", described as "felt a sharp pain with a needle like sensation"; BONE SWELLING (non-serious), outcome "not recovered", described as "right patella is really swollen". Therapeutic measures were taken as a result of dizziness, pain in extremity, arthralgia, gait inability, peripheral swelling, insomnia, pain, bone swelling.  Additional Information: Transferring agent stated, "So, they had a male patient 72 years old (captured as provided) on the back line. So, what he reported was he got the Comirnaty vaccine, the Pfizer Covid Vaccine 2023-2024 formula on 11Oct2023 from (Witheheld) so, within 24 hours he experienced side effects such as a little bit dizzy and then he started to get pain in his left and right leg. Then 48 hours then his knees was little sore. He describes that he usually walks two and a half to three miles a day. So, 48 hours in when he tries to walk in the morning further describe that he usually walks 2 and a half to three miles a day. He noticed that his knees is a little bit sore and then he said that he had problems with his knees and legs for years but on the afternoon during his walk at about 100 feet suddenly he felt a sharp pain with a needle like sensation. He said it was really bad and so he couldn't walk anymore. His right patella was really swollen he said but after the statement he couldn't walk anymore his right leg was really swollen. Then on Saturday or Sunday he tried to call them, tried to call Pfizer but they were closed and so he put ice and took Ibuprofen and it's 75 to 80 percent better. He said that there was still a little bit swelling. He couldn't sleep but now it's better. So, he further added he just feels a little bit pain around the patella.  The information on the batch/lot number for bnt162b2 omi xbb.1.5 has been requested and will be submitted if and when received.