hypothesized that it was atrial fibrillation throwing a clot; Stroke; hypothesized that it was atrial fibrillation throwing a clot; she has put on weight since the stroke/overweight; Caller reported that ever since the stroke, she has had a little more anxiety so she does take it twice a day; This is a spontaneous report received from a contactable consumer, the patient. A 70-year-old elderly female received the second dose of intramuscular BNT162B2 (solution for injection; Lot EL9262 and expiry information not provided) as a single dose in the right arm on 03Feb2021 at 08:30 (at 70-years-old) for COVID-19 immunization. Relevant medical history included ongoing osteoporosis (Oct2020), osteopenia (2018), ongoing hypothyroidism, hysterectomy (1992; woke up from surgery, felt like a different person), sinus disorder. hypertension, iodine allergy, environmental allergies (allergic to just about everything that grows out of the ground) especially pollen, and Ex-smoker (quit smoking several years ago, lost 40 pounds), Relevant family history included tachycardia and arrhythmia and cardiac arrest in father (daddy had tachycardia; he did have an arrhythmia she thinks, his heart shocked into rhythm; her father has been dead since 2004 (at age 82). Concomitant medications included bupropion hydrochloride (WELLBUTRIN) for smoking cessation therapy from unspecified date; acetylsalicylic acid (ASPIRIN ) for prophylaxis from estradiol ongoing from an unspecified date; hydrochlorothiazide for blood pressure from an unspecified start date to 2021; estradiol for osteoporosis ongoing from an unspecified date; levothyroxine for thyroid disorder from 2020; cetirizine hydrochloride (ZYRTEC ALLERGY) for sinus disorder/ hypersensitivity, seasonal allergy ongoing from 2020; atorvastatin (LIPITOR) for blood cholesterol from an unspecified start date to 2021; amlodipine taken for hypertension from an unspecified date; estrogens conjugated (PREMARIN) for hysterectomy from an unspecified date; levothyroxine sodium (SYNTHROID) for thyroid disorder from an unspecified date; Vitamin B complex (VITAMIN B) for an unspecified indication from an unspecified date; Vitamin D3 (VITAMIN D3) for bone density decreased from an unspecified date; calcium for bone density decreased from an unspecified date; and Vitamin K2. The patient previously received COVID-19 immunization with the first dose of intramuscular BNT162B2 (solution for injection; Lot EL3249 expiry information not provided) as a single dose in the right arm on 13Jan2021 at 08:30 (at 70 years-old). The patient previously received immunization with shingles vaccination with what she thinks was the second dose on 25Feb2020 (at 69-years-old). The patient previously received immunization with flu shot in Aug2020 (at 70-years-old). On 19Feb2021 at 08:30 the patient experienced a stroke and was hospitalized on that same date after physician office and emergency department visits. The patient reported that they do not know what caused the stroke but hypothesized that it was atrial fibrillation throwing a clot. The patient reported that she has never had atrial fibrillation and had never been treated by a cardiologist until she had the stroke. The patient explained that the only symptom she had was that her right hand went limp, and she could not grab or do anything with it. The patient reported that it was when she called her daughter, that she realized that she had aphasia as well. The patient explained that she had a monitor implanted in her chest, not a pacemaker, just a monitor like a chip. The patient explained that the monitor faxed anything that was going on with her heart to her cardiologist's office. The patient also mentioned that since the stroke she has put on weight/is overweight (120 pounds prior to stroke); and she has had a little more anxiety, so she does take it twice a day. A computerized tomogram (CT) scan head and neck with contrast obtained on 19Feb2021 showed two possible areas of developing peripheral infarction involving the left frontal lobe and left parietal lobe, likely embolic in nature. No thromboembolism in circle of Willis, but micro emboli are possible beyond the visuals of the CTA; no flow limiting stenosis in neck. An echocardiogram obtained on 20Feb2021 was normal. A complete blood count (CBC) and lipids obtained on unspecified dates were unknown results. On 04Jul2021 the patient's blood pressure was 95/61. The patient was discharged from the hospital on 21Feb2021. The outcome of the events stroke and hypothesized that it was atrial fibrillation throwing a clot was recovered with sequalae. The outcome of the event put on weight since the stroke/overweight was recovered on an unspecified date in 2021. The outcome of the anxiety was unknown.