Thought he was having a stroke; Woke up at midnight and his chest felt like it was being crushed; In his head he felt disconnected; He was still feeling bad today but better as the day goes on; Couldn't feel his pulse; This spontaneous case was reported by a consumer and describes the occurrence of CEREBROVASCULAR ACCIDENT (Thought he was having a stroke) in a 10-decade-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 01-Dec-2021 at 10:00 AM, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, the patient experienced CEREBROVASCULAR ACCIDENT (Thought he was having a stroke) (seriousness criterion medically significant), CHEST DISCOMFORT (Woke up at midnight and his chest felt like it was being crushed), HEAD DISCOMFORT (In his head he felt disconnected), FEELING ABNORMAL (He was still feeling bad today but better as the day goes on) and PULSE ABNORMAL (Couldn't feel his pulse). At the time of the report, CEREBROVASCULAR ACCIDENT (Thought he was having a stroke), CHEST DISCOMFORT (Woke up at midnight and his chest felt like it was being crushed), HEAD DISCOMFORT (In his head he felt disconnected), FEELING ABNORMAL (He was still feeling bad today but better as the day goes on) and PULSE ABNORMAL (Couldn't feel his pulse) was resolving.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In December 2021, Computerised tomogram head: abnormal (abnormal) Patient had undergone a CAT scan on head at hospital and they thought he was having a stroke.. In December 2021, Heart rate: abnormal (abnormal) Patient couldn't feel his pulse at midnight post vaccination..         No concomitant medications were reported. Treatment medications were not reported.  The patient was in 90's who received the vaccine booster shot and went to bed at 9 pm but woke up at midnight. A little later in his head he felt disconnected so called an ambulance. At the hospital he went through a lot of tests and a CAT scan on his head and they he was having a stroke, After some time, he started to feel better and was able to go home. He was feeling bad but better as the day goes on. Company Comment: This case concerns a  male patient in his nineties with no relevant medical , who experienced the unexpected serious AESI of CEREBROVASCULAR ACCIDENT (reported as "Thought he was having a stroke"), with concurrent non serious events of chest discomfort, pulse abnormal and head discomfort. The events occurred approximately on the same day after the booster dose of mRNA-1273 vaccine. The patient went to hospital, where a CT scan was performed to rule out stroke, although no results were provided. He was discharged home. The rechallenge was not applicable since the event happened after the third dose and no information on additional dosing is available. The patient´s age remains as a confounder. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report. Case was assessed as serious due to important medical event and medical judgement.   Most recent FOLLOW-UP information incorporated above includes: On 02-Dec-2021: Follow up document contains no new information.; Sender's Comments: This case concerns a  male patient in his nineties with no relevant medical , who experienced the unexpected serious AESI of CEREBROVASCULAR ACCIDENT (reported as "Thought he was having a stroke"), with concurrent non serious events of chest discomfort, pulse abnormal and head discomfort. The events occurred approximately on the same day after the booster dose of mRNA-1273 vaccine. The patient went to hospital, where a CT scan was performed to rule out stroke, although no results were provided. He was discharged home. The rechallenge was not applicable since the event happened after the third dose and no information on additional dosing is available. The patient´s age remains as a confounder. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report. Case was assessed as serious due to important medical event and medical judgement.