shaking with fever this morning/ really bad fevers/ she had a really high fever; shaking with fever this morning; her muscles were so bad; she couldn't move her body or yell at her mother; she couldn't move her body or yell at her mother; moaning in pain; burning hot; she felt so cold even though she already had two blankets on her; her daughter was weak; moaning in pain; she was lost; received her booster dose of the Pfizer COVID Vaccine; doesn't wake up or only wakes up when mother wakes her and gives her water; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the parent.  A 17 year-old female patient received bnt162b2 (BNT162B2), administration date 09Jan2022 (Lot number: FE3594) at the age of 17 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "pseudo seizures" (unspecified if ongoing), notes: she has a history of pseudo seizures. There were no concomitant medications. Vaccination history included: Bnt162b2 (Dose 1, LOT: EW0168, Dosage text: injected in her right arm), administration date: 11May2021, when the patient was 17 years old, for COVID-19 Immunization, reaction(s): "Covid-19", "vaccination failure"; Bnt162b2 (Dose 2, LOT: EW0187), administration date: 01Jun2021, when the patient was 17 years old, for COVID-19 Immunization, reaction(s): "Covid-19", "vaccination failure". The following information was reported: HYPERSOMNIA (non-serious) with onset Jan2022, outcome "recovering", described as "doesn't wake up or only wakes up when mother wakes her and gives her water"; PYREXIA (non-serious) with onset 10Jan2022, outcome "recovering", described as "shaking with fever this morning/ really bad fevers/ she had a really high fever"; TREMOR (non-serious) with onset 10Jan2022, outcome "recovering", described as "shaking with fever this morning"; MUSCLE DISCOMFORT (non-serious) with onset 10Jan2022, outcome "recovering", described as "her muscles were so bad"; MOVEMENT DISORDER (non-serious), SPEECH DISORDER (non-serious) all with onset 10Jan2022, outcome "recovering" and all described as "she couldn't move her body or yell at her mother"; MOANING (non-serious), PAIN (non-serious) all with onset 10Jan2022, outcome "recovering" and all described as "moaning in pain"; BURNING SENSATION (non-serious) with onset 10Jan2022, outcome "recovering", described as "burning hot"; FEELING COLD (non-serious) with onset 10Jan2022, outcome "recovering", described as "she felt so cold even though she already had two blankets on her"; ASTHENIA (non-serious) with onset 10Jan2022, outcome "recovering", described as "her daughter was weak"; FEELING ABNORMAL (non-serious) with onset 10Jan2022, outcome "recovering", described as "she was lost"; IMMUNISATION (non-serious) with onset 09Jan2022, outcome "unknown", described as "received her booster dose of the Pfizer COVID Vaccine". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of hypersomnia, pyrexia, tremor, muscle discomfort, movement disorder, speech disorder, moaning, burning sensation, feeling cold, asthenia, pain, feeling abnormal.  Additional information: The patient received her booster dose of Pfizer COVID-19 vaccine on 09Jan2022, 9 days after her COVID-19 diagnosis. It was mentioned that yesterday, the patient was fine and had no symptoms, and received the booster dose as advised by the doctor. The reporter thought that the patient should wait 30 days after getting diagnosed with COVID-19 to be able to get the vaccine shot. In the morning of 10Jan2022, the patient was shaking with really high fever, and could not move or even yell at her mother. The patient was burning hot and was so cold even though the patient already had 2 covers of blanket. The patient was literally shaking and was moaning in pain, was lost and was weak. On Jan2022, the patient does not want to wake up and only wakes up when she wanted to drink water. The patient had a history of pseudo-seizures and the patient's mother initially thought that the patient was having an episode but turned out not. It was also reported that the patient's muscles were so bad. The patient's mother was assuming that the booster dose was given too soon but the doctor gave the go signal to do it. The patient's mother was asking what to do and if the booster dose was given too early.  The patient received treatment of two Extra Strength Tylenol 500mg as treatment for the events. The patient took two in one time and they were extra strength gel capsules. The patient's symptoms got better and they have been giving the patient a lot of water.  No follow-up attempts are possible. No further information is expected.