Booster; Arm really hurt; Had the booster on my left deltoid and I can't even hold things; Cannot hold even simple things, like I cannot hold a bag with my left hand; I was in a lot of joint pain/my joints still are very painful/Feels like somebody beat my hands with a hammer and my knees hurt; muscle pain; I would have missed 3 days of work; This is a spontaneous report received from a contactable nurse (patient).  A patient (no qualifiers provided) received bnt162b2 (BNT162B2), administered in deltoid left, administration date 07Sep2021 (Batch/Lot number: unknown) as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose:1, Lot number: EJ1685), administration date: 19Dec2020, for COVID-19 Immunization; Bnt162b2 (Dose:2, Lot number: EL3246), administration date: 06Jan2021, for COVID-19 Immunization, reaction(s): "Pain in muscles", "Aches". The following information was reported: IMMUNISATION (non-serious) with onset 07Sep2021, outcome "unknown", described as "Booster"; PAIN IN EXTREMITY (non-serious) with onset 07Sep2021, outcome "unknown", described as "Arm really hurt"; MUSCULAR WEAKNESS (non-serious) with onset 07Sep2021, outcome "unknown", described as "Had the booster on my left deltoid and I can't even hold things; Cannot hold even simple things, like I cannot hold a bag with my left hand"; ARTHRALGIA (non-serious) with onset 07Sep2021, outcome "not recovered", described as "I was in a lot of joint pain/my joints still are very painful/Feels like somebody beat my hands with a hammer and my knees hurt"; MYALGIA (non-serious) with onset 07Sep2021, outcome "unknown", described as "muscle pain"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious) with onset 07Sep2021, outcome "unknown", described as "I would have missed 3 days of work".  Additional information: It wasn't anything not to be expected pain in muscles, aches and bla-bla-bla. But the third one about 5 hours after the patient got it. So, that was07Sep2021, their arm really hurt, their hand and patient actually missed two days of work, was in a lot of joint pain and muscle pain and all of that and patient would have missed 3 days of work. But patient just did not want to lose their co-workers. Patient was training somebody and had to be there, so they never miss work. So, the thing is like that patient joints still were very painful. Patient had the booster on their left deltoid and can't even hold things, it's like patient do not have Arthritis. But this must be how Arthritis feels. So, patient cannot hold even simple things, like cannot hold a bag with their left hand, their hands, thumbs, fingers, wrist it feels like somebody beat their hands with a hammer and their knees hurt. Now patient was not saying that their knees do not hurt anyway, but 'they hurt a lot patient ankles feels like, all their joints and they were hoping that this would go away but it hasn't.  This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.