headache; have a mild reaction of body aches; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 75 year-old female patient received bnt162b2 (BNT162B2) (Batch/Lot number: unknown) as dose 1, single and (Batch/Lot number: unknown) as dose 2, single for covid-19 immunisation. Relevant medical history included: "Epilepsy" (unspecified if ongoing), notes: therefore is on a keto and low sodium diet, does not eat sugar; "Three brain injuries" (unspecified if ongoing); "Allergies" (unspecified if ongoing), notes: she has lots of allergies; "migraines" (unspecified if ongoing); "strange reaction to my tea" (unspecified if ongoing); "stomach didn't feel well" (unspecified if ongoing), notes: eating light diet since stomach didn't feel well, bananas, applesauce. The patient's concomitant medications were not reported. Vaccination history included: Flu vaccine (only gets a low dose flu vaccine no other vaccines), for immunisation. The following information was reported: PAIN (non-serious), outcome "recovered", described as "have a mild reaction of body aches"; HEADACHE (non-serious), outcome "unknown", described as "headache".  Additional information: Caller states that after her first Pfizer BioNtech covid 19 vaccine she had a mild reaction. Caller reports that after this booster last Tuesday she had a severe reaction. Caller reports receiving the vaccine at 11 am then about 4 pm she developed fever and chills per caller it really went quite high,. She also developed body aches, she went to bed at 11 pm woke up at 2 am couldn't go back to sleep so cold because of high fever, she did not have a thermometer but felt hot to touch, hot on forehead and abdominal area. Caller reports living in a senior centre where it is always warm and she is always cold she put on a heavy winter coat and blanket to warm up, this went on for over a day and caller reports that it took a lot out of her. On Wednesday when she went to bed still had body aches woke up Thursday with an unbelievable headache. Caller reports having migraines before but this was nothing like a migraine. This was all over her head and didn't go away kept her down for a couple of days. It moved from top of her head and down to back of head, and then on side of head excruciating painful. In the morning after took migraine medications, took another after 4 hours, couldn't stand the pain, that did nothing still hurting, during the day took another, never had to take 3 in one day before this. Caller reports she is still not feeling well finally headache went away. Caller reports being so tired from it all when she is normally energetic. Caller also reports she thought she could have covid but she is no respiratory symptoms. Caller reports these side effects are 5x what a normal person may have. Caller also reports that she not has gastric pain. She has history of epilepsy therefore is on a keto and low sodium diet, does not eat sugar. Caller also reports eating light diet since stomach didn't feel well, bananas and applesauce. Caller also reports a strange reaction to my tea. Caller also reports she has lots of allergies and only gets a low dose flu vaccine no other vaccines. Caller reports that her sister received the Moderna vaccine who has no medical conditions and she was just tired. Reason for no lot number: of Pfizer COVID Vaccine: Other: Caller states this is a follow up call to her initially filed report. Additional Context: Caller asked if this is the correct location for medical safety and was given the number to call and called previously about her reaction to the Pfizer Booster Vaccine and is calling back in follow up to her previously filed initial report and was wondering why she had such a severe reaction. Caller was asked for clarification on her question and states it is for all of it and she had the first two shots of the Pfizer COVID Vaccine and she did have a mild reaction of body aches and had no fever or chills and that lasted a day and the next day and then all of a sudden it went away and states she did have a headache; states she has medical conditions and told them in the previous report that she had epilepsy, three brain injuries and allergies and states this was all before the booster vaccine; no further clarification provided by the caller. States she was in an extreme fever and was so chilled and got her heaviest winter coat to wear and could not get warm and that lasted a day; states she never gets a temperature and can't remember the last time she had a temperature and it is normally 97.6 degrees but this time she was so hot to the touch that she knew her temperature was way above normal if she was that chilled; states she had severe body aches and the worst part was headaches and this was such a shock and she is still not well. Caller states she has no report reference number to provide for her initial report.   This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.