swelling under armpit; chills; fever; weird body aches; This is a spontaneous report received from contactable reporter(s) (Other HCP). The reporter is the patient.  A 51 year-old female patient received bnt162b2 (COMIRNATY), intramuscular, administered in deltoid left, administration date 01Feb2022 (Lot number: FK9895, Expiration Date: 20Dec2069) at the age of 51 years as dose 3 (booster), 0.3 ml single for covid-19 immunisation. Relevant medical history included: "diabetes" (ongoing); "Hypothyroidism" (ongoing); "Hypercholesterolaemia" (ongoing); "kidney protectant because of her diabetes" (unspecified if ongoing), notes: kidney protectant because of her diabetes. Concomitant medication(s) included: LEVOTHYROXINE taken for hypothyroidism (ongoing); JARDIANCE taken for diabetes mellitus, start date: 2019 (ongoing); LISINOPRIL taken for renal injury, start date: 2019 (ongoing); ATORVASTATIN taken for hypocholesterolaemia (ongoing). Vaccination history included: Comirnaty (Dose 1, Lot: EN6207, Expiration: Unknown , Route, Anatomical Location: Not Provided, With the first two, she had nothing, maybe a sore arm), administration date: 16Mar2021, when the patient was 50 years old, for COVID-19 Immunization, reaction(s): "sore arm"; Comirnaty (Dose 2, Lot: ER8733 , Expiration: Unknown , Route, Anatomical Location: Not Provided, With the first two, she had nothing, maybe a sore arm), administration date: 06Apr2021, when the patient was 50 years old, for COVID-19 Immunization, reaction(s): "sore arm". The following information was reported: PAIN (non-serious) with onset 02Feb2022, outcome "not recovered", described as "weird body aches"; PYREXIA (non-serious) with onset 02Feb2022 11:00, outcome "not recovered", described as "fever"; CHILLS (non-serious) with onset 02Feb2022 18:00, outcome "not recovered", described as "chills"; SWELLING (non-serious) with onset 02Feb2022 18:30, outcome "not recovered", described as "swelling under armpit". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: The patient reported that She just want to report this as she was reading through the website. She knows this is not a fatal issue. She wanted to report what happened after having teh 3rd dose. Not sure it is related to having Covid 27 Dec 2021. She is a healthcare worker so it is mandatory and they said to receive it within 30 days of being infected. Tested positive 27Dec2021 and then got the third dose on 01Feb2022 and then within 12 hours she had fever, chills, and body aches. With the first two, she had nothing, maybe a sore arm. but with this one she had severe chills and last night had body aches. Weird body aches across the lower back and down lower legs and across the hips. She had to take Advil, she had already taken Tylenol, so this could subside so she could sleep. Symptoms are still here today. She feels like crap. She really feels like crap and had no reaction to the first two. She could have called out of work today, but as a nurse she keeps chugging along. Also having swelling under armpit too, weirdly, and everyone says that it is lymph nodes and that is fine.  Is there a Product Complaint: Yes, Description of Product Complaint: Reporting AE with Booster Dose of Comirnaty. Not sure it is related to having Covid 27Dec2021. She had to receive it within 30 days of being affected. The Covid test was PCR. With the first two, she had nothing, maybe a sore arm. She thinks there should be a a timeline to get the booster after having Covid. Especially since Pfizer's is the full dose and not the half dose. She had to take Advil, she had already taken Tylenol, so this could subside so she could sleep. Symptoms are still here today. She feels like crap. Caller clarified Advil as she took Ibuprofen. She doesn't like to take Ibuprofen because it is not good for the kidneys. she took it in order to go to sleep because the Tylenol didn't work for the body aches. The Tylenol worked for the fever but not the body aches.  No follow-up attempts are possible. No further information is expected.