the patient does not remember what happened; numb legs; felt lightheaded -dizziness; at first could not hear when spoken to; Fell, or possibly fainted or passed out; shaking; patient felt a little off or funny for a while - dazed; had flu-like symptoms; pain as the second dose really hurt while being administered; tired; This spontaneous case was reported by a consumer and describes the occurrence of LOSS OF CONSCIOUSNESS (Fell, or possibly fainted or passed out) in a 23-year-old female 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.   In May 2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. In May 2021, the patient experienced INFLUENZA LIKE ILLNESS (had flu-like symptoms), VACCINATION SITE PAIN (pain as the second dose really hurt while being administered) and FATIGUE (tired). On 31-May-2021 at 8:30 AM, the patient experienced LOSS OF CONSCIOUSNESS (Fell, or possibly fainted or passed out) (seriousness criterion medically significant) and TREMOR (shaking). 31-May-2021 at 8:30 AM, the patient experienced FEELING ABNORMAL (patient felt a little off or funny for a while - dazed) and HYPOACUSIS (at first could not hear when spoken to). On 06-Jun-2021 at 8:30 PM, the patient experienced HYPOAESTHESIA (numb legs) and DIZZINESS (felt lightheaded -dizziness). On an unknown date, the patient experienced AMNESIA (the patient does not remember what happened). On 31-May-2021, LOSS OF CONSCIOUSNESS (Fell, or possibly fainted or passed out), TREMOR (shaking) and FEELING ABNORMAL (patient felt a little off or funny for a while - dazed) had resolved. On 31-May-2021 at 8:35 AM, HYPOACUSIS (at first could not hear when spoken to) had resolved. On 06-Jun-2021, HYPOAESTHESIA (numb legs) and DIZZINESS (felt lightheaded -dizziness) had resolved. At the time of the report, INFLUENZA LIKE ILLNESS (had flu-like symptoms), AMNESIA (the patient does not remember what happened), VACCINATION SITE PAIN (pain as the second dose really hurt while being administered) and FATIGUE (tired) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 06-Jun-2021, Blood test: normal (normal) normal. On 06-Jun-2021, Electrocardiogram: normal (normal) Found nothing wrong. On 06-Jun-2021, Thyroid function test: normal (normal) Found nothing wrong.         Concomitant product use was not provided by the reporter.  The patient experienced some pretty weird stuff after completing the Moderna Covid-19 series. The patient received both doses on separate occasions at drive-up vaccination events. The patient had maybe passed out and that at first could not hear when spoken to and was sitting there all dazed with her eyes kind of weird and was shaking.  Within 5 minutes most of the symptoms had resolved. The patient felt a little off or funny for a while, and the symptoms resolved in an hour. On 06-Jun-2021 at probably 8:30 pm the patient had lightheadedness and dizziness and something like numb legs, described as the same type of spell she had before on 31May2021 because the patient said she was feeling the same things again. Because of the symptoms, the patient's husband took her to the Emergency Room (ER) last night 06-Jun-2021.  She was not admitted to the hospital but was released last night 6Jun2021.  No treatment information was provided.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested