Transient ischemia attack (TIA) stroke; Couldn't move her left side, it was so weak she couldn't walk; It was so weak she couldn't walk; Left side of her face was numb; lip was numb; when she would speak it felt different; couldn't move her left side; Tachycardic; anemic; This is a spontaneous report from a contactable consumer (patient, stated as pharmacist in India but not yet licensed in the United States). This 28-year-old female patient received 2nd dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number EW0186, expiration date Aug2021) at single dose on 21Jul2021 10:00 at 28-year-old via an unknown route in left arm for Covid-19 immunization. Medical history included ongoing anemia. Patient stated that she was anemic prior to vaccine which causing her to have tachycardia. Family history included mother was anemic . There were no other products. No additional vaccines administered on same date of the Pfizer suspect. No other prior vaccinations within four weeks prior to the first administration date of the suspect vaccine.  Historical vaccine included 1st dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number EW0186, expiration date Aug2021) at single dose on 30Jun2021 10:00 at 28-year-old via an unknown route in right arm for Covid-19 immunization and no reaction on previous exposure to vaccine. On 05Aug2021, she experienced a transient ischemia attack (TIA) stroke. She was hospitalized for 4 days from 05Aug2021 to 09Aug2021. The event resulted in Emergency Room visit but not Physician Office visit. The clinical course was reported as follows: this past Wednesday, clarifies it was actually early Thursday morning on 05Aug2021, this was almost 2 weeks after the vaccine, she had a TIA, clarifies a Transient Ischemic Stroke, was hospitalized for 4 days. States the doctor said that they believe it was a crazy side effect of the vaccine, she was perfectly healthy otherwise, stated everything else came up very normal. She was just waiting on some genetic blood disorders, but had no family history of blood or clotting disorders. It was a lot and kept her in the hospital because she was also anemic and tachycardic. The consumer further stated at the time of the event, the first 2 hours after it started she had the worst of the symptoms, she couldn't move her left side, it was so weak she couldn't walk, when she would speak it felt different, the left side of her face was numb, her lip was numb.  The doctor said she was recovered completely, the first two hours were serious symptoms, was fully recovered by 6 hours.  They kept her at the hospital because she was anemic and causing her to have tachycardia, states she was anemic prior to vaccine, it was not new. Her mother was anemic, this was not new for her, Hemoglobin went up to 7.1 so they did not transfuse blood.  It was also reported that no relevant tests were performed. Her doctor told her that what happened to her was due to the vaccine. The consumer stated that she was in a small town and there had been similar cases of TIA as well but did not provide demographics of the other people.  Outcome of anemic and tachycardic was resolved on an unknown date in 2021.  Outcome of events was resolved on 09Aug2021.  The reporter considered TIA was serious with  Seriousness criteria-Caused/prolonged hospitalization.   Follow-up attempts are completed. No further information is expected.