covid booster; Last two weeks she got exposed to a person with covid; muscle and joint pain; muscle and joint pain; Slight fever; Chills; This is a spontaneous report received from contactable reporter(s) (Other HCP). The reporter is the patient.  A 48 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 08Dec2021 (Lot number: FF2590) at the age of 48 years as dose 3 (booster), 0.3ml, single for covid-19 immunisation. Relevant medical history included: "Breast cancer", start date: 2018 (unspecified if ongoing), notes: Verbatim: Breast cancer; "treatment in 2020 for her chemo", stop date: 2020, notes: She has an oncologist as well and just finished treatment in 2020 for her chemo. She is immunocompromised.; "immunocompromised" (unspecified if ongoing), notes: She has an oncologist as well and just finished treatment in 2020 for her chemo. She is immunocompromised. There were no concomitant medications. Vaccination history included: Bnt162b2 (First dose Pfizer covid vaccine: 18Dec2020, in left arm, Lot: EK5730, Expiration: unknown, She had no reaction aside from soreness where shots was given.), administration date: 18Dec2020, when the patient was 47 years old, for COVID-19 Immunization, reaction(s): "soreness where shots was given"; Bnt162b2 (Second dose Pfizer: 06Jan2021, in left arm, Lot: EL0142, Expiration: unknown, She had no reaction aside from soreness where shots was given.), administration date: 06Jan2021, when the patient was 47 years old, for COVID-19 Immunization, reaction(s): "soreness where shots was given"; Flu shot (Prior Vaccinations (within 4 weeks): Had flu shot on 29Nov2021 or 30Nov2021 Lot: unknown), for Immunization.  The following information was reported: IMMUNISATION (non-serious), outcome "unknown", described as "covid booster"; EXPOSURE TO SARS-COV-2 (non-serious), outcome "unknown", described as "Last two weeks she got exposed to a person with covid"; MYALGIA (non-serious), ARTHRALGIA (non-serious) all with onset 09Dec2021, outcome "recovered" (10Dec2021) and all described as "muscle and joint pain/ right elbow has pain/ pain in right knee pain/ She had joint and muscle pain in her shoulders"; PYREXIA (non-serious) with onset 09Dec2021, outcome "recovered" (10Dec2021), described as "Slight fever"; CHILLS (non-serious) with onset 09Dec2021, outcome "recovered" (10Dec2021), described as "Chills". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of myalgia, arthralgia, pyrexia, chills.  Additional information: RN wanted to report that she had a covid booster shot Wednesday. Yesterday about 12 hours after the booster shot she got side effects. She was feeling better. HCP: Full contact details not available. She has an oncologist as well and just finished treatment in 2020 for her chemo. She was immunocompromised. Treatment/Outcome: She started getting better last night, took two tylenol around 5am and was still not getting better and then took Tylenol 500mg around 11 or 1130 am and she was still not better. She took Motrin around 4pm. By 730 pm she was better. She had chills on and off yesterday. Clarifies it is generic acetaminophen by (withheld), not Tylenol  (She just gets used to calling it Tylenol) Lot: DEE3046A, Exp: Dec 2021. She last had fever around 1300 yesterday. By 4pm she took Motrin and fever was 99. Now her is fever gone. She had joint and muscle pain in her knees, elbows, shoulders on left side where she got the injection, the right shoulder has no pain but right elbow has pain and pain in right knee pain. All the pain is gone as of today. When querying causality, reports it was sudden and she never felt this way with the first two doses. She had no reaction aside from soreness where shots was given. Last two weeks she got exposed to a person with covid and she had a covid pcr test and it was negative. Description of complaint: She started getting better last night, took two tylenol around 5am and was still not getting better and then took Tylenol 500mg around 11 or 1130 am and she was still not better. She took Motrin around 4pm. By 730 pm she was better. She had chills on and off yesterday.   No follow-up attempts are possible. No further information is expected.