Not sure if the platelet count has to do with the vaccine; A rash; Fever of 102 F; Terribly headache/Took aspirin for headache but didn't go away; Had a CAT scan because the neurologist saw something and though it was a stroke; I've experienced side effects after getting the vaccine; Swelling of the arm; Flu like symptoms; didn't go to the doctor until I had blurry vision; unexplained black and blue bruising/Had the bruising problem for 4 months until it got less and less; I couldn't move my head for 4 weeks; Low Platelet count; This spontaneous case was reported by a consumer and describes the occurrence of CEREBROVASCULAR ACCIDENT (Had a CAT scan because the neurologist saw something and though it was a stroke) in a 69-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 019B21A and 012AZ1A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concomitant products included AMLODIPINE for Blood pressure, MOMETASONE FUROATE (NASONEX) for an unknown indication.   On 03-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 31-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 31-Mar-2021, the patient experienced CEREBROVASCULAR ACCIDENT (Had a CAT scan because the neurologist saw something and though it was a stroke) (seriousness criterion medically significant), VACCINATION COMPLICATION (I've experienced side effects after getting the vaccine), PERIPHERAL SWELLING (Swelling of the arm), INFLUENZA LIKE ILLNESS (Flu like symptoms), VISION BLURRED (didn't go to the doctor until I had blurry vision), CONTUSION (unexplained black and blue bruising/Had the bruising problem for 4 months until it got less and less), HYPOKINESIA (I couldn't move my head for 4 weeks), PLATELET COUNT DECREASED (Low Platelet count), RASH (A rash), PYREXIA (Fever of 102 F) and HEADACHE (Terribly headache/Took aspirin for headache but didn't go away). On 06-Jan-2022, the patient experienced PLATELET DISORDER (Not sure if the platelet count has to do with the vaccine). The patient was treated with ACETYLSALICYLIC ACID (ASPIRINE) for Headache, at an unspecified dose and frequency. At the time of the report, CEREBROVASCULAR ACCIDENT (Had a CAT scan because the neurologist saw something and though it was a stroke), VACCINATION COMPLICATION (I've experienced side effects after getting the vaccine), PERIPHERAL SWELLING (Swelling of the arm), INFLUENZA LIKE ILLNESS (Flu like symptoms), VISION BLURRED (didn't go to the doctor until I had blurry vision), CONTUSION (unexplained black and blue bruising/Had the bruising problem for 4 months until it got less and less), HYPOKINESIA (I couldn't move my head for 4 weeks), PLATELET COUNT DECREASED (Low Platelet count), PLATELET DISORDER (Not sure if the platelet count has to do with the vaccine), RASH (A rash), PYREXIA (Fever of 102 F) and HEADACHE (Terribly headache/Took aspirin for headache but didn't go away) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Computerised tomogram: abnormal (abnormal) it was a stroke. On an unknown date, Platelet count: low (Low) Low Platelet count. On an unknown date, Pyrexia: 102 (High) fever of 102 F.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Patient reported that she experienced side effects after receiving the first 2 doses of the Moderna COVID-19 vaccine.Her doctor told that her immune system was too reactive and prescribed her steroids for 5 days and antibiotics but she doesn't know the name. Also, she is confused as one doctor told her to get the booster and another doctor told her that it could be dangerous for her getting the vaccine.  Vaccine was given in left arm(IM).; Sender's Comments: This case concerns a 69-year-old, female patient with no relevant medical history, who experienced the unexpected serious event of Cerebrovascular Accident; and non-serious events of Vaccination complication, Peripheral swelling, Influenza like illness, Vision Blurred, Contusion, Hypokineasia, Platelet count decreased, Rash, Pyrexia, and Headache  The events occurred approximately 1 day after the second dose of mRNA-1273 (Moderna covid-19 vaccine). Patient reported her physician stated her immune system was too reactive, prescribed her steroids, and aspirin for the headache but didn't resolved. Patient then was referred to a neurologist who ordered a CAT scan (result not provided) because of a presumptive stroke. The rechallenge was not applicable as events occurred after second dose. The benefit-risk relationship of mRNA-1273 (Moderna covid-19 vaccine) is not affected by this report.