severe joint pains/ extreme joint pain, like every joint in the body her muscles hurt; chills/bone chilling cold/teeth were chattering; fever, this was all for 36 hours fever 101.8; severe headache; nauseated; She was miserable/feeling bad/strange feeling; deathly ill; fluttering of the heart/ heart fluttering; heart palpitations; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team for a Pfizer sponsored program. The reporter is the patient.  A 61 year-old female patient received bnt162b2 (BNT162B2), administered in arm, administration date 21Mar2021 (Lot number: ER8730) at the age of 61 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Hypothyroidism" (unspecified if ongoing); "She has Latex sensitivity" (unspecified if ongoing); "she has environmental allergies" (unspecified if ongoing); "she has environmental allergies to mold and mildew" (unspecified if ongoing); "She is allergic to bleach." (unspecified if ongoing). Concomitant medication(s) included: ARMOUR THYROID taken for hypothyroidism. Vaccination history included: Bnt162b2 (DOSE 1, Lot EN6198, Expiry Date Unknown, Administered in the Left Arm), administration date: 01Mar2021, when the patient was 61 years old, for Covid-19 immunization, reaction(s): "Pain and redness at injection site", "Vaccination site erythema", "itchiness", "arm at the injection site felt weird", "it's like she was Popeye with this muscle, she was starting to feel it", "reaction at the injection site", "the arm ended up getting very hot and hard", "it was very red/ redness", "became itchy", "symptoms progressing with the arm". The following information was reported: CARDIAC FLUTTER (medically significant) with onset 2021, outcome "not recovered", described as "fluttering of the heart/ heart fluttering"; ILLNESS (non-serious) with onset Mar2021, outcome "unknown", described as "deathly ill"; ARTHRALGIA (non-serious) with onset 22Mar2021, outcome "recovered" (23Mar2021), described as "severe joint pains/ extreme joint pain, like every joint in the body her muscles hurt"; CHILLS (non-serious) with onset 22Mar2021, outcome "recovered" (22Mar2021), described as "chills/bone chilling cold/teeth were chattering"; PYREXIA (non-serious) with onset 22Mar2021, outcome "recovered" (23Mar2021), described as "fever, this was all for 36 hours fever 101.8"; HEADACHE (non-serious) with onset 22Mar2021, outcome "recovered" (23Mar2021), described as "severe headache"; NAUSEA (non-serious) with onset 21Mar2021, outcome "recovered" (23Mar2021), described as "nauseated"; FEELING ABNORMAL (non-serious) with onset Mar2021, outcome "recovered" (Mar2021), described as "She was miserable/feeling bad/strange feeling"; PALPITATIONS (non-serious) with onset 2021, outcome "not recovered", described as "heart palpitations". It was asked if she could still get the booster after her experience. Reported that after the second dose she waited 15 minutes and was fine, she came home and didn't even put the 2 together but she was bone chilling cold, she had on winter coats sweaters, scarfs blankets. Her teeth were chattering, she was having chills which then gave way to all the symptoms. She had a fever, this was all for 36 hours fever 101.8 and then extreme joint pain, like every joint in the body her muscles hurt. She had a severe headache in which she couldn't look into the light, she was in bed and out the whole time. She was also nauseated which all lasted 36 hours and then all went away. Added that she was not sure if this was also pertinent but when she went in for the second dose it was an ER nurse that gave it, and she shared with the ER nurse about the local reaction at the injection site she had, in which the nurse asked her if she has allergies, she told the nurse that she has a latex sensitivity, nothing like a major allergy or anything anaphylactic, the nurse told her that she would change out the needle. She stated that the needle still has to pass through rubber and then the serum is drawn up. The nurse then gave the vaccine, and she doesn't know but nothing happened at the injection site for the second vaccine but the joint pain was extreme that she had to crawl to the bathroom. Now she understands that for 36 hours she was deathly ill but her main concern was her heart fluttering, because of this she was not sure if she was a good candidate for the booster, but everyone in her family was urging her to get it. It was clarified that by the time she got the second immunization her arm looked fine and normal before the second vaccination. Chills: She was miserable, it was for a couple hours and turned into the fever setting in. Fever: She does not know the exact time she had it, she had it even at nighttime, she was not measuring. Joint Pain: It was within few hours, counting the first day of getting the vaccine, all the time she was miserable, then on the 3rd day she woke up at noon time and her symptoms disappeared. Severe Headache: She woke up with a headache but it was not as severe on the 3rd day, by noon time it went away. It was clarified stating that everything had went away by the 23Mar2021. She did not seek help of a health profession. Stated that given her acute phase of what she told after the COVID vaccine, her heart palpitations or heart flutters, was the main reason for the call. She has concerns about the heart and has no clue about the fluttering. She didn't have it before, it definitely started after the vaccine during her feeling bad, she was not sure if it happens daily, but it happens about every 2-3 days she guesses, it was on going and persisting. She can't even say how long it last when it does happen, that's a strange feeling. The patient underwent the following laboratory tests and procedures: body temperature: (22Mar2021) 101.8.  No follow-up attempts are possible. No further information is expected.