Stroke; Blood clots; Brain bleed; Wife found him on the floor after he collapsed; Still struggling to move left hand; Felt really weird; Acting differently; Kept rubbing his arm and saying it was burning; Wife found him on the floor after he collapsed and fell off the couch; Unable to move or talk; Can't speak / unable to talk; Can not stand up; Arm hurting like crazy / arm was killing him; This spontaneous case was reported by a consumer and describes the occurrence of CEREBROVASCULAR ACCIDENT (Stroke), THROMBOSIS (Blood clots), CEREBRAL HAEMORRHAGE (Brain bleed), LOSS OF CONSCIOUSNESS (Wife found him on the floor after he collapsed) and HEMIPARESIS (Still struggling to move left hand) in a 54-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. unknown) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, the patient experienced CEREBROVASCULAR ACCIDENT (Stroke) (seriousness criteria hospitalization and medically significant), THROMBOSIS (Blood clots) (seriousness criteria hospitalization and medically significant), CEREBRAL HAEMORRHAGE (Brain bleed) (seriousness criterion medically significant), LOSS OF CONSCIOUSNESS (Wife found him on the floor after he collapsed) (seriousness criterion medically significant), HEMIPARESIS (Still struggling to move left hand) (seriousness criterion medically significant), FEELING ABNORMAL (Felt really weird), ABNORMAL BEHAVIOUR (Acting differently), BURNING SENSATION (Kept rubbing his arm and saying it was burning), FALL (Wife found him on the floor after he collapsed and fell off the couch), HYPOKINESIA (Unable to move or talk), APHONIA (Can't speak / unable to talk), DYSSTASIA (Can not stand up) and MYALGIA (Arm hurting like crazy / arm was killing him). At the time of the report, CEREBROVASCULAR ACCIDENT (Stroke), THROMBOSIS (Blood clots), CEREBRAL HAEMORRHAGE (Brain bleed), LOSS OF CONSCIOUSNESS (Wife found him on the floor after he collapsed), HEMIPARESIS (Still struggling to move left hand), FEELING ABNORMAL (Felt really weird), ABNORMAL BEHAVIOUR (Acting differently), BURNING SENSATION (Kept rubbing his arm and saying it was burning), FALL (Wife found him on the floor after he collapsed and fell off the couch), HYPOKINESIA (Unable to move or talk), APHONIA (Can't speak / unable to talk), DYSSTASIA (Can not stand up) and MYALGIA (Arm hurting like crazy / arm was killing him) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Concomitant product use was not provided by the reporter.  It was reported that, the patient felt really weird and was acting differently.  Four days after the patient received the vaccine, his wife found him on the floor after he collapsed and fell off the couch and was unable to move or talk. He was taken to hospital and was in ICU for 5-6 days.  Treatment information was not provided.  Very limited information regarding this event/s has been provided at this time.  Further information has been requested.; Sender's Comments: Very limited information regarding this event/s has been provided at this time.  Further information has been requested.