booster; Arm was sore; Developed high fever, it has got up to 103, I just can''t seem to get it down without medicine/ I am still experiencing it, about 30 minutes ago I took my temperature and it was 102.6; Muscle ache; Fatigue, I am just super tired; I feel like I have flu; This one has knocked me bad like I feel sick; I just can''t do the work; Bone talking like I can't move it forward like it's bad; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 39 year-old female patient received bnt162b2 (BNT162B2), administration date 10Dec2021 (Lot number: FD7218) as dose 3 (booster), 0.3 ml single for covid-19 immunisation. Relevant medical history included: "Verbatim: Hashimoto's Hypothyroidism" (unspecified if ongoing), notes: Verbatim: Hashimoto''s Hypothyroidism. Concomitant medication(s) included: LEVOTHYROXINE taken for autoimmune thyroiditis. Vaccination history included: Covid-19 vaccine (1st dose , manufacturer: Unknown), for COVID-19 Immunization; Covid-19 vaccine (2nd dose, manufacturer: unknown), for COVID-19 Immunization, reaction(s): "my second was like I didn't felt great".  The following information was reported: IMMUNISATION (non-serious) with onset 10Dec2021, outcome "not recovered", described as "booster"; PAIN IN EXTREMITY (non-serious) with onset 10Dec2021, outcome "not recovered", described as "Arm was sore"; PYREXIA (non-serious) with onset 10Dec2021, outcome "not recovered", described as "Developed high fever, it has got up to 103, I just can''t seem to get it down without medicine/ I am still experiencing it, about 30 minutes ago I took my temperature and it was 102.6"; MYALGIA (non-serious) with onset 10Dec2021, outcome "not recovered", described as "Muscle ache"; FATIGUE (non-serious) with onset 10Dec2021, outcome "not recovered", described as "Fatigue"; INFLUENZA LIKE ILLNESS (non-serious) with onset 10Dec2021, outcome "not recovered", described as "I feel like I have flu"; ILLNESS (non-serious) with onset 10Dec2021, outcome "not recovered", described as "This one has knocked me bad like I feel sick"; IMPAIRED WORK ABILITY (non-serious) with onset 10Dec2021, outcome "not recovered", described as "I just can''t do the work"; MOVEMENT DISORDER (non-serious) with onset 10Dec2021, outcome "not recovered", described as "Bone talking like I can't move it forward like it's bad". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of immunisation, pain in extremity, pyrexia, myalgia, fatigue, influenza like illness, illness, impaired work ability.  Additional information:   Reporter seriousness for Developed high fever, it has got up to 103, the patient just can't seem to get it down without medicine; the patient was still experiencing it, about 30 minutes ago, the patient took temperature and it was 102.6: Unspecified. Reporter seriousness for Developed high fever, it has got up to 103, I just can't seem to get it down without medicine; I am still experiencing it, about 30 minutes ago I took my temperature and it was 102.6: Unspecified. Concomitant Products Levothyroxine: Consumer stated, "Just once daily in the PM.". So, the patient received third vaccine yesterday around would 4-4:30 and then about an hour and half arm was sore, bone talking like could'nt move it forward like it's bad, but was like okay, but then by that evening the patient developed high fever that having to keep Advil on board in order to keep it down because it has got up to 103. Just muscle ache, fatigue, feel like I have flu. But the fever is just (voice not clear), I just can't seem to get it down without medicine." Consumer stated, "Yes and was still experiencing it, about 30 minutes ago I took my temperature and it was 102.6 and the patient was on Advil, has been administered about 5 hours before." Concomitant medicine: Consumer stated, "No I take like supplements like magnesium and biotin." Treatment: Consumer stated, "Last night the patient took 2 capsules around 2 am and then when it 'wore off', the patient tried to use one, tried to take a lower dose and it didn't last very long, so the patient had to take another 2 capsules of Advil, it was the liquid gels (Suspect captured conservatively and PC Filed Conservatively)."  No follow-up attempts are possible. No further information is expected.