nurse stated it could possibly be blood clots; Patient is afraid he is going to have a stroke or scared he had one after the COVID-19 Vaccines; blurred vision in right eye that comes and goes; ringing in his left ear; Very fatigued throughout the day, sleeping a lot/tired and sleeps a lot; Very fatigued throughout the day, sleeping a lot/tired and sleeps a lot; Date received First dose: Third Friday in Feb2021/Received second dose on 12Apr2021, six weeks after first dose; Date received First dose: Third Friday in Feb2021/Received second dose on 12Apr2021, six weeks after first dose; Fullness in face; Body aches; Brain fog: At times he can't do the simplest things. He will look at the clock on the wall and says he knows what it is, but can't find the words to say. Cannot carry on a conversation intelligently; Brain fog: At times he can't do the simplest things. He will look at the clock on the wall and says he knows what it is, but can't find the words to say. Cannot carry on a conversation intelligently; Brain fog: At times he can't do the simplest things. He will look at the clock on the wall and says he knows what it is, but can't find the words to say. Cannot carry on a conversation intelligently; headache all over the back of his head/Affecting his balance. In back of head, moves around, sometimes the front; headache all over the back of his head/Affecting his balance. In back of head, moves around, sometimes the front; feeling dizziness/had to stop driving; This is a spontaneous report from a contactable consumer (patient's wife). A 50-years-old male patient received bnt162b2 (BNT162B2), dose 2 via an unspecified route of administration on 12Apr2021 (may have been in morning) (Batch/Lot Number: Unknown; Pfizer COVID-19 vaccine) as 2ND DOSE, SINGLE for covid-19 immunization, at the age at vaccination of 50 years old. The patient's medical history and concomitant medications were not reported. History and Investigations: Doesn't take any medications. Has no medical conditions, unless age was considered a medical condition. Historical vaccine included first dose of COVID-19 Vaccine reported as on Third Friday in Feb2021 (First dose: between 1430-1530), and experienced AEs:  Brain fog; Headache: Thinks in the back of the head, but moved around too, sometimes in the front. Has affected his balance. Dizziness: Had to stop a couple times while driving home from vaccine facility. Aches and pains. All symptoms from the first dose went away within 3-4 days. Caller would say patient recovered completely from symptoms associated with first dose.  The patient experienced nurse stated it could possibly be blood clots on an unspecified date with outcome of unknown, patient is afraid he is going to have a stroke or scared he had one after the covid-19 vaccines on an unspecified date with outcome of unknown, brain fog: at times he can't do the simplest things. he will look at the clock on the wall and says he knows what it is, but can't find the words to say. cannot carry on a conversation intelligently on 12Apr2021 with outcome of not recovered, headache all over the back of his head/affecting his balance. in back of head, moves around, sometimes the front on 12Apr2021 with outcome of not recovered, feeling dizziness/had to stop driving on 12Apr2021 with outcome of not recovered, blurred vision in right eye that comes and goes on an unspecified date with outcome of not recovered, ringing in his left ear on an unspecified date with outcome of not recovered, fullness in face on 12Apr2021 with outcome of not recovered, body aches on 12Apr2021 with outcome of not recovered, very fatigued throughout the day, sleeping a lot/tired and sleeps a lot on an unspecified date with outcome of not recovered,  date received first dose: third friday in feb2021/received second dose on 12apr2021, six weeks after first dose on an unspecified date with outcome of unknown.  Patient was caller's husband. Had both doses and had the same problem. His experience is very bad with the second dose and has had it for a month.  Within a day after the first dose, had brain fog, headache, and dizziness where he had to stop driving a couple times. This went away within a few days. Patient and caller were concerned about the second dose. They spoke with patient's doctor and the local Health Department, both said it couldn't be from the vaccine. Patient was advised to get the second dose. Had the same symptoms with second dose, but occurred within an hour of received second dose. Symptoms have continued. Also experiencing blurred vision in right eye that comes and goes. Patient had an appointment with his doctor this week, but the doctor basically didn't look at him. Doctor advised patient to see a neurologist. Another nurse stated it could possibly be blood clots. Caller is trying to find help. Caller wanted to add with the second dose, patient experienced ringing in his left ear, fullness in his face, and headache all over the back of his head. Was feeling dizziness after second dose and had to stop driving.  Patient is afraid he is going to have a stroke or scared he had one after the COVID-19 Vaccines. If the COVID-19 Vaccines woke up some other health issues, patient wants to get it taken care of. Received second dose on 12Apr2021, six weeks after first dose. Got second dose at a different location. Second dose COVID-19 Vaccine AEs: Started experiencing symptoms within an hour. Headache: Affecting his balance. In back of head, moves around, sometimes the front. Comes and goes. Brain fog: At times he can't do the simplest things. He will look at the clock on the wall and says he knows what it is, but can't find the words to say. Cannot carry on a conversation intelligently. Dizziness. Blurred vision in right eye: Doesn't know if this started on 12Apr2021 or a couple days after. States as the day goes on and he gets tired, it will worsen. It comes and goes. Ringing in left ear: Began on 12Apr2021 or a few days after. Fullness in face: Stated this comes and goes, but has stayed the same. Documented as provided. Body aches: Comes and goes. Seems to worsen as the day goes on. Very fatigued throughout the day, sleeping a lot: He's tired and sleeps a lot. It was hard for him to get out of bed. Caller stated patient's symptoms worse as the days goes on. Patient never experienced pain at the injection site. Guesses patient received COVID-19 vaccines in his left arm because the county was doing a dive-thru clinic. Since he didn't get out of his car, she believed patient would have received the vaccines in the left arm. The events REQUIRE A VISIT TO Physician office: Doctor doesn't think anything is wrong. ER: Not yet. Is considering going to the ER today. PRIOR VACCINCATIONS WTIHIN 4 WEEKS was None. RELEVANT TESTS: None. Events Clot blood and stroke considered medically significant.   Follow up attempts are needed. Information of Lot/Batch number has been requested.