varicella meningitis virus; the immune system was fighting itself; headache/severe headaches; dizziness; Her left side is completely and constantly in pain, like legs, arms, neck, head; Her left side is completely and constantly in pain, like legs, arms, neck, head; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. A 55-year-old female patient received BNT162b2 (COMIRNATY), in Apr2021 as dose 1, single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: PAIN IN EXTREMITY (medically significant), NECK PAIN (medically significant) all with onset 2021, outcome "recovering" and all described as "Her left side is completely and constantly in pain, like legs, arms, neck, head"; DIZZINESS (medically significant) with onset 2021, outcome "recovering"; HEADACHE (hospitalization, disability, life threatening) with onset 2021, outcome "recovering", described as "headache/severe headaches"; AUTOIMMUNE DISORDER (hospitalization, disability, life threatening) with onset 2021, outcome "recovering", described as "the immune system was fighting itself"; VARICELLA MENINGITIS (hospitalization, disability, medically significant, life threatening) with onset 2021, outcome "recovering", described as "varicella meningitis virus". The patient was hospitalized for varicella meningitis, headache, autoimmune disorder (hospitalization duration: 16 day(s)). The patient underwent the following laboratory tests and procedures: tests: (2021) nothing showing; Lumbar puncture: (2021) severe virus and inflammation, notes: in her spine and in her brain.  Additional information: The reporter mentioned that his wife had a problem with the vaccine. Since then the patient was disabled and her health decline. Husband of patient reported that his wife "received her first and only dose of the Pfizer Covid 19 vaccine in Apr2021 (he did not have actual date with him at the time of report) and shortly after ended up in the hospital with severe condition called 'VZV - varicella meningitis virus'.  The patient had severe inflammation in her spine and in her brain. Unfortunately, after first dose, the patient developed severe headaches, they went to the hospital, they kept them all day, could not find nothing, they sent them back home. The next day it got much worse, they went back to the hospital and they did all the tests again, nothing showing. Then they decided to do a spinal tap, they discovered that the patient had a severe virus and inflammation in her spine and in her brain because the immune system saw the vaccine as an attack and started attacking itself. So basically the immune system was fighting itself. They barely saved her life. The patient was there for 16 days in the hospital. When the patient came out of hospital, she was no longer the same. The patient was disabled. Her left side is completely and constantly in pain, like legs, arms, neck, head. The patient had severe headaches constantly and dizziness. Basically, the patient was very very sick. The patient got a disability award letter last year in Nov2022. The reporter decided to call because the reporter cannot provide for her medical insurance, and it is needed to continue her healing process. There are a set of 9 doctors trying to help the patient and it will be 2 years in Apr2023. So far, the patient is 50 percent better but other 50 percent may take another 1-2 years for her to get better. The situation was her employer was paying for her medical insurance up until 31Dec2022 last year. Her employer was hoping she would come back to work, but they will no longer do that. The reporter only works part-time due to her condition, since she needs a caregiver all the time.  When the patient sleeps, the reporter works. The reporter assessed the events as non-serious.  The information on the batch/lot number for [BNT162B2] has been requested and will be submitted if and when received.