patient was not concentrating well and asks not to be asked too many questions; it does not let him walk almost; he can walk indoors and he runs out of oxygen, he use oxygen all the time; lot of back pain; sweats a lot, when he is not cold he sweats a lot; arm pain; tired/exhausted; lost consciousness/couldn't even remember the days; woke up all the time, he could not breathe/breathing like panting; woke up very bad; patient had no balance; did not feel well; got very hungry; got very thirsty; sneezing; started to feel silly; running nose/running nose was getting stronger and stronger; patient has been dead for two or three days day and night; This spontaneous case was reported by a consumer and describes the occurrence of LOSS OF CONSCIOUSNESS (lost consciousness/couldn't even remember the days) in a 61-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 002C21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Emphysema and COPD.    On 26-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 26-Apr-2021, the patient experienced HUNGER (got very hungry), THIRST (got very thirsty), SNEEZING (sneezing), FEELING ABNORMAL (started to feel silly), RHINORRHOEA (running nose/running nose was getting stronger and stronger) and UNEVALUABLE EVENT (patient has been dead for two or three days day and night). On 27-Apr-2021, the patient experienced DYSPNOEA (woke up all the time, he could not breathe/breathing like panting), MOOD ALTERED (woke up very bad), BALANCE DISORDER (patient had no balance) and MALAISE (did not feel well). On 28-Apr-2021, the patient experienced LOSS OF CONSCIOUSNESS (lost consciousness/couldn't even remember the days) (seriousness criterion medically significant). On an unknown date, the patient experienced DISTURBANCE IN ATTENTION (patient was not concentrating well and asks not to be asked too many questions), GAIT DISTURBANCE (it does not let him walk almost), OXYGEN CONSUMPTION DECREASED (he can walk indoors and he runs out of oxygen, he use oxygen all the time), BACK PAIN (lot of back pain), HYPERHIDROSIS (sweats a lot, when he is not cold he sweats a lot), VACCINATION SITE PAIN (arm pain) and FATIGUE (tired/exhausted). At the time of the report, LOSS OF CONSCIOUSNESS (lost consciousness/couldn't even remember the days), HUNGER (got very hungry), THIRST (got very thirsty), SNEEZING (sneezing), FEELING ABNORMAL (started to feel silly), RHINORRHOEA (running nose/running nose was getting stronger and stronger), MOOD ALTERED (woke up very bad), BALANCE DISORDER (patient had no balance), MALAISE (did not feel well), DISTURBANCE IN ATTENTION (patient was not concentrating well and asks not to be asked too many questions), GAIT DISTURBANCE (it does not let him walk almost), OXYGEN CONSUMPTION DECREASED (he can walk indoors and he runs out of oxygen, he use oxygen all the time), BACK PAIN (lot of back pain), UNEVALUABLE EVENT (patient has been dead for two or three days day and night) and VACCINATION SITE PAIN (arm pain) outcome was unknown and DYSPNOEA (woke up all the time, he could not breathe/breathing like panting), HYPERHIDROSIS (sweats a lot, when he is not cold he sweats a lot) and FATIGUE (tired/exhausted) had not resolved.        mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was withdrawn on an unknown date.       Treatment medication included acetaminophen for arm pain and a lot of back pain and other medications included Steroids and oxygen. Concomitant medications included High blood pressure medicines, high blood sugar medicines ("under control"), cholesterol medicines and medicines for his lung disease.  Based on current available information and the temporal association between product use and the start date of the events a causal relationship cannot be excluded.; Sender's Comments: Based on current available information and the temporal association between product use and the start date of the events a causal relationship cannot be excluded.