got COVID; got COVID; couldn't stop fainting/fainting; seizures/ Grand mal seizures; severely autistic; Reynaud's syndrome; weakness/ weak/ frail/ physically weak; chest pain; dizziness; mentality going down hill,; always picked his skin; her son cant answer her cant hear her, states he is just spaced out; symptoms are progressively getting worst; ill; cannot get out of bed to go to the bathroom by himself; he is just spaced out; he couldn't get up, states he likes to sit on the floor and he can no longer go from sitting to standing; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the parent.  An 18-year-old male patient received BNT162b2 (BNT162B2), on 28Jul2021 as dose 1, single (Lot number: FA7485) at the age of 17 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "Autism since childhood" (ongoing), notes: since childhood; "Reynold's syndrome since childhood" (ongoing), notes: since childhood. The patient's concomitant medications were not reported. The following information was reported: REYNOLD'S SYNDROME (medically significant) with onset Jul2021, outcome "unknown", described as "Reynaud's syndrome"; DERMATILLOMANIA (non-serious) with onset Jul2021, outcome "unknown", described as "always picked his skin"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious) with onset Jul2021, outcome "unknown", described as "cannot get out of bed to go to the bathroom by himself"; CHEST PAIN (non-serious) with onset Jul2021, outcome "not recovered"; SYNCOPE (medically significant) with onset Jul2021, outcome "not recovered", described as "couldn't stop fainting/fainting"; DIZZINESS (non-serious) with onset Jul2021, outcome "not recovered"; DYSSTASIA (non-serious) with onset Jul2021, outcome "unknown", described as "he couldn't get up, states he likes to sit on the floor and he can no longer go from sitting to standing"; FEELING ABNORMAL (non-serious) with onset Jul2021, outcome "unknown", described as "he is just spaced out"; COGNITIVE DISORDER (non-serious) with onset Jul2021, outcome "unknown", described as "her son cant answer her cant hear her, states he is just spaced out"; ILLNESS (non-serious) with onset Jul2021, outcome "unknown", described as "ill"; MENTAL DISORDER (non-serious) with onset Jul2021, outcome "not recovered", described as "mentality going down hill,"; GENERALISED TONIC-CLONIC SEIZURE (medically significant) with onset Jul2021, outcome "not recovered", described as "seizures/ Grand mal seizures"; AUTISM SPECTRUM DISORDER (medically significant) with onset Jul2021, outcome "unknown", described as "severely autistic"; CONDITION AGGRAVATED (non-serious) with onset Jul2021, outcome "unknown", described as "symptoms are progressively getting worst"; ASTHENIA (non-serious) with onset Jul2021, outcome "unknown", described as "weakness/ weak/ frail/ physically weak"; DRUG INEFFECTIVE (medically significant), SUSPECTED COVID-19 (medically significant) all with onset Dec2021, outcome "unknown" and all described as "got COVID". The patient underwent the following laboratory tests and procedures: Blood test: Unknown results, notes: had a CAT scan and blood work; Computerised tomogram: Unknown results, notes: had a CAT scan and blood work; Electroencephalogram: didn't find anything. Clinical information: Caller stated after he (patient) had the vaccine within a week, his health has been progressively going down hill. Caller states her son has been having grand mal seizures and fainting. States that ever since he has had the vaccine he has become physically weak and ill. This has not been reported to Pfizer previously, it was reported to the doctors. States her son also saw a cardiologist who also saw him and thinks this all has something to do with the vaccine. States he was weak, frail, and mentality going down hill, states he already had the brain of a two year old but she could tell what he knew before, states now her son cant answer her cant hear her, states he was just spaced out. He was severely autistic, but this is worse than his baseline. States obviously disabled prior to this but there has been a major decline since he had the shot. This all started within a week of the vaccine, end of Jul2021. Caught COVID in Dec2021 and after that he also got worse. States from him being already gone from Jul2021 to Dec2021 she couldn't tell how bad his Covid was. States patient looks like a 90 year old man. Caller clarified that starting in Apr2022 the seizures were full blown, states at first he was eating and fell back and cracked his head, states at this time he had a full blown 5 minutes seizure and called ambulance. Reported Seriousness: No.  No follow-up attempts are possible. No further information is expected.