sense of dizziness; difficult for her to concentrate; arm soreness; Fatigue; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 25 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 23Apr2021 14:30 (Batch/Lot number: unknown) at the age of 25 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "COVID-19", start date: 2020 (unspecified if ongoing), notes: last year in the summer, she thought her immune system has been different since then. The patient's concomitant medications were not reported. The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 23Apr2021, outcome "recovered" (25Apr2021), described as "arm soreness"; FATIGUE (non-serious) with onset 23Apr2021, outcome "not recovered", described as "Fatigue"; DIZZINESS (non-serious) with onset 25Apr2021, outcome "not recovered", described as "sense of dizziness"; DISTURBANCE IN ATTENTION (non-serious) with onset 25Apr2021, outcome "unknown", described as "difficult for her to concentrate". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of pain in extremity, fatigue, dizziness. Additional Information: It was stated that consumer called regarding Pfizer COVID 19 vaccine. Stated that she wanted to report side effects with first dose. She was scheduled for the second dose on 14May2021.She added the dizziness had been hitting her in waves and she stated she could not really distinguish between the dizzy sensation and fatigue, especially since she spent the first three days resting. Added the dizziness really started when she got up and tried to work out on 25Apr2021. The arm soreness and fatigue started that evening after the vaccination. Mentions the sense of dizziness has made it difficult for her to concentrate. Adds she started her period on 25Apr2021 but she doesn't usually feel this way with her period. Adds she did take Tylenol on the 24Apr2021. She had not gone to the doctor. Mentioned her partner had the vaccination at the same time and she had soreness and tiredness but she got over all that. A clone report is created to document the partner's experience. The Primary/Prescriber stated that she was in process of finding a HCP; declined to provide. The patient stated that her vaccination card was in the car and her partner has the car today. She would have it in about four hours. Mentioned she was about to go to a new job in an office with 70 other people and she wanted to be prepared.  She added she had been tested regularly and had not gotten COVID again. She had seen that her immune system has changed since last year. Mentions she had not had a chance yet to follow up with a doctor regarding this. She mentioned she was also going to ask if she should see a doctor before; and she was wondering if dizziness was a good thing like the vaccine was working? or when she should she get alarmed? Added she knew they can't provide medical advice. There was no history of all previous immunization with the Pfizer vaccine to be considered as suspect. There was no additional vaccines administered on same date of the Pfizer Suspect. There was no Prior Vaccinations (within 4 weeks). There was no history (including any illness at time of vaccination). There was no Family History.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.