First 4 days mild fatigue with very sore/ Days 5-11, severe fatigue; very sore, hot and swollen left arm; very sore, hot and swollen left arm; very sore, hot and swollen left arm; loss of appetitive; fever of 103; severe generalized body aches; violent full body muscle spasms; freezing cold with white feet and toes; freezing cold with white feet and toes; Labored breathing; Could not walk around the house, hold objects or talk due to violent shaking; Could not walk around the house, hold objects or talk due to violent shaking; This is a spontaneous report received from contactable reporter(s) (Other HCP). The reporter is the patient.  A 60-year-old female patient (not pregnant) received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 28Sep2022 at 12:00 as dose 3 (booster), single (Lot number: GJ5342) intramuscular, in left arm for covid-19 immunisation. The patient's relevant medical history included: "Hypothyroid" (unspecified if ongoing); "mild hypertension" (unspecified if ongoing); "Chronic Fatigue", start date: 1989 (unspecified if ongoing); "Known allergies: penicillin" (unspecified if ongoing); "Known allergies: certain chemicals" (unspecified if ongoing); "covid" (unspecified if ongoing), notes: prior vaccination. The patient took concomitant medications. Past drug history included: Thimerosal, reaction(s): "Known allergies: Thimerosal". Vaccination history included: BNT162b2 (brand=Pfizer, Is bivalent=False, lot number=FL3209, administrator route=Intramuscular, administration time=01:00 PM, dose number=2, vaccine location=Left arm), administration date: 05Mar2022, when the patient was 60-year-old, for COVID-19 Immunization; BNT162b2 (brand=Pfizer, Is bivalent=False, lot number=FL3209, administrator route=Intramuscular, administration date=15Jan2022, administration time=10:30 AM, dose number=1, vaccine location=Left arm), administration date: 15Jan2022, when the patient was 60-year-old, for COVID-19 Immunization. The following information was reported: GAIT DISTURBANCE (non-serious), TREMOR (non-serious) all with onset 02Oct2022 at 12:00, outcome "recovering" and all described as "Could not walk around the house, hold objects or talk due to violent shaking"; FATIGUE (non-serious) with onset 02Oct2022 at 12:00, outcome "recovering", described as "First 4 days mild fatigue with very sore/ Days 5-11, severe fatigue"; DYSPNOEA (non-serious) with onset 02Oct2022 at 12:00, outcome "recovering", described as "Labored breathing"; PYREXIA (non-serious) with onset 02Oct2022 at 12:00, outcome "recovering", described as "fever of 103"; PERIPHERAL COLDNESS (non-serious), PALLOR (non-serious) all with onset 02Oct2022 at 12:00, outcome "recovering" and all described as "freezing cold with white feet and toes"; DECREASED APPETITE (non-serious) with onset 02Oct2022 at 12:00, outcome "recovering", described as "loss of appetitive"; PAIN (non-serious) with onset 02Oct2022 at 12:00, outcome "recovering", described as "severe generalized body aches"; PAIN IN EXTREMITY (non-serious), PERIPHERAL SWELLING (non-serious), FEELING HOT (non-serious) all with onset 02Oct2022 at 12:00, outcome "recovering" and all described as "very sore, hot and swollen left arm"; MUSCLE SPASMS (non-serious) with onset 02Oct2022 at 12:00, outcome "recovering", described as "violent full body muscle spasms". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of fatigue, pain in extremity, peripheral swelling, feeling hot, decreased appetite, pyrexia, pain, muscle spasms, peripheral coldness, pallor, dyspnoea, gait disturbance, tremor.  Additional information: First 4 days mild fatigue with very sore, hot and swollen left arm. Days 5-11, severe fatigue, loss of appetitive, fever of 103, severe generalized body aches and violent full body muscle spasms lasting 1 hour to 2 hours each time. When it stopped the patient would sleep. The patient felt freezing cold with white feet and toes. Labored breathing during spasms. The patient took Tylenol and Ibuprofen. Could not walk around the house, hold objects or talk due to violent shaking. Very very painful spasms. The patient was severely allergic to Thimerosal and always ask multiple times if a vaccine contains it before getting the vaccine. The patient did that with each dose. Two doctors told her last Dec2021 to only get the Pfizer because it did not have Thimerosal. This was a very severe and scary reaction. The patient inquired whether the vaccine have Thimerosal.