very weak and is struggling; very weak and is struggling; soreness in right arm; Nausea; Difficulty in walking/left leg and left arm just give out and he is not able to walk very well; Difficulty lifting his arms; Blurred vision; starting to slur words and is having difficulty collecting his thoughts; He got his vaccine injection in his right arm and it still hurts; gotten worse each day; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 49 year-old male patient received bnt162b2 (BNT162B2), administered in arm right, administration date 05Jan2022 13:00 (Lot number: 33036BD) at the age of 49 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Relevant medical history:None" (unspecified if ongoing), notes: Patient history: No. There were no concomitant medications. Vaccination history included: Bnt162b2 (1st dose of covid vaccine, Pfizer Covid 19 Vaccine, 1st dose received in left arm., Lot: EW0172, Expiry: 31Aug2021), administration date: 20Apr2021, when the patient was 48 years old, for COVID-19 Immunization, reaction(s): "States that he had mild reactions after the first two Covid 19 vaccines. He just had some queasiness for a day or 2 from a sore arm, but no major reactions.", "States that he had mild reactions after the first two Covid 19 vaccines. He just had some queasiness for a day or 2 from a sore arm, but no major reactions."; Bnt162b2 (2nd dose of covid vaccine, Pfizer Covid 19 Vaccine, 2nd dose received in left arm. , Lot: EW0182, Expiry: Aug2021), administration date: 10May2021, when the patient was 48 years old, for COVID-19 Immunization, reaction(s): "States that he had mild reactions after the first two Covid 19 vaccines. He just had some queasiness for a day or 2 from a sore arm, but no major reactions.", "States that he had mild reactions after the first two Covid 19 vaccines. He just had some queasiness for a day or 2 from a sore arm, but no major reactions.". The following information was reported: ASTHENIA (non-serious), FEELING ABNORMAL (non-serious) all with onset 06Jan2022, outcome "not recovered" and all described as "very weak and is struggling"; ARTHRALGIA (non-serious) with onset 06Jan2022, outcome "unknown", described as "soreness in right arm"; NAUSEA (non-serious) with onset 06Jan2022, outcome "unknown", described as "Nausea"; GAIT DISTURBANCE (non-serious) with onset 06Jan2022, outcome "unknown", described as "Difficulty in walking/left leg and left arm just give out and he is not able to walk very well"; MOVEMENT DISORDER (non-serious) with onset 06Jan2022, outcome "unknown", described as "Difficulty lifting his arms"; VISION BLURRED (non-serious) with onset 06Jan2022, outcome "unknown", described as "Blurred vision"; THINKING ABNORMAL (non-serious) with onset 06Jan2022, outcome "unknown", described as "starting to slur words and is having difficulty collecting his thoughts"; VACCINATION SITE PAIN (non-serious) with onset 06Jan2022, outcome "not recovered", described as "He got his vaccine injection in his right arm and it still hurts"; CONDITION AGGRAVATED (non-serious) with onset 06Jan2022, outcome "not recovered", described as "gotten worse each day".  Additional information: The patient reported that he was very weak right now and was struggling. Stated that he was extremely healthy prior to receiving the booster, but he was struggling now. Patient's side effects have included the normal soreness in his arm, like he had been punched in the arm. But the last 2-3 days he has had severe nausea, overall weakness, and he is having difficulty walking and lifting his arms, particularly the left side which is the opposite of where he got the shot. Clarifies that his left leg and left arm just give out and he is not able to walk very well. He got his vaccine injection in his right arm and it still hurts. He also has blurred vision, and difficulty with forming thoughts and communicating which is different than before. States that he is a teacher and tutor so he speaks for a living but he has noticed that he is starting to slur words and is having difficulty collecting his thoughts. The events began on 06Jan2022 and have progressively gotten worse each day. He could barely get out of bed at this point. At first he thought it may be a coincidence, but wanted to check on it because it is pretty significant at this point. Stated that now he could not straighten out without tipping over and he could not even walk his dog at this point. No investigation assessment. No emergency room visit or physician office visit. The patient did not have any recourse to get medical care. The patient stated that he felt like he was about to fall over so he needed to go and would call later.  No follow-up attempts are possible. No further information is expected.