super dizzy, gets really really light headed; He passed out once, and very close to passing out the other times; his extremities get tingly; delayed speech, and he feels like he's going to say something but it doesn't come out; gets really bad headaches, The lightheaded comes and goes but the headaches is persistent; he feels like he's going to vomit; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of DIZZINESS (super dizzy, gets really really light headed), LOSS OF CONSCIOUSNESS (He passed out once, and very close to passing out the other times), PARAESTHESIA (his extremities get tingly), SPEECH DISORDER (delayed speech, and he feels like he's going to say something but it doesn't come out), HEADACHE (gets really bad headaches, The lightheaded comes and goes but the headaches is persistent) and NAUSEA (he feels like he's going to vomit) in a 20-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     The patient's past medical history included No adverse event (No medical history 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 DIZZINESS (super dizzy, gets really really light headed) (seriousness criterion medically significant), LOSS OF CONSCIOUSNESS (He passed out once, and very close to passing out the other times) (seriousness criterion medically significant), PARAESTHESIA (his extremities get tingly) (seriousness criterion medically significant), SPEECH DISORDER (delayed speech, and he feels like he's going to say something but it doesn't come out) (seriousness criterion medically significant), HEADACHE (gets really bad headaches, The lightheaded comes and goes but the headaches is persistent) (seriousness criterion medically significant) and NAUSEA (he feels like he's going to vomit) (seriousness criterion medically significant). At the time of the report, DIZZINESS (super dizzy, gets really really light headed), LOSS OF CONSCIOUSNESS (He passed out once, and very close to passing out the other times), PARAESTHESIA (his extremities get tingly), SPEECH DISORDER (delayed speech, and he feels like he's going to say something but it doesn't come out), HEADACHE (gets really bad headaches, The lightheaded comes and goes but the headaches is persistent) and NAUSEA (he feels like he's going to vomit) had not resolved. Not Provided      The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown Route) was unknown.       Patient received Moderna vaccine almost 5-6 weeks ago, the exact date was not reported. Patient started having events 2 days after the administration of mRNA-1273. Since then, patient has been rushed to ER (Emergency Room) 4 time already. Patient has seen a neurologist, nephrologist, cardiologist but they cant find anything.  Several tests and procedure including " all the blood work, CT, MRI. Spinal tap, ECHO Cardiogram" have performed, and the results of this tests/procedure reported as "shows nothing"; Sender's Comments: Based on the information provided which includes a temporal association between the use of mRNA-1273 vaccine and onset of the reported events, and excluding other etiologies, a causal relationship with the product use cannot be excluded.