Nauseated; Felt feverish; Fainting/Came to on the floor at the bottom of the stairs; Fainting/Came to on the floor at the bottom of the stairs; A little confusing at first; Shaking and clammy and too weak to get up; Shaking and clammy and too weak to get up; Slightly dizzy when I tried to get up; Wasn't hungry at all; Possible that I was dehydrated; Achy/Woke with such achiness that I couldn't sleep; Shaking,clammy and chills; Overall just really tired; Arm seriously sore and tight; This spontaneous case was reported by an other and describes the occurrence of SYNCOPE (Fainting/Came to on the floor at the bottom of the stairs) in a female patient of an unknown age who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 immunisation. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Drug allergy (Codeine type meds).   On 26-Jan-2021 at 7:15 AM, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 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. On 26-Jan-2021 at 10:00 AM, the patient experienced VACCINATION SITE PAIN (Arm seriously sore and tight). On 26-Jan-2021 at 4:00 PM, the patient experienced PAIN (Achy/Woke with such achiness that I couldn't sleep), CHILLS (Shaking,clammy and chills) and FATIGUE (Overall just really tired). On 27-Jan-2021, the patient experienced SYNCOPE (Fainting/Came to on the floor at the bottom of the stairs) (seriousness criterion medically significant), FALL (Fainting/Came to on the floor at the bottom of the stairs), CONFUSIONAL STATE (A little confusing at first), COLD SWEAT (Shaking and clammy and too weak to get up), ASTHENIA (Shaking and clammy and too weak to get up), DIZZINESS POSTURAL (Slightly dizzy when I tried to get up), DECREASED APPETITE (Wasn't hungry at all) and DEHYDRATION (Possible that I was dehydrated). On 27-Jan-2021 at 2:00 AM, the patient experienced NAUSEA (Nauseated) and PYREXIA (Felt feverish). On 27-Jan-2021, SYNCOPE (Fainting/Came to on the floor at the bottom of the stairs), FALL (Fainting/Came to on the floor at the bottom of the stairs) and CONFUSIONAL STATE (A little confusing at first) had resolved. On 28-Jan-2021, PAIN (Achy/Woke with such achiness that I couldn't sleep), COLD SWEAT (Shaking and clammy and too weak to get up), ASTHENIA (Shaking and clammy and too weak to get up), DIZZINESS POSTURAL (Slightly dizzy when I tried to get up), DECREASED APPETITE (Wasn't hungry at all), DEHYDRATION (Possible that I was dehydrated), CHILLS (Shaking,clammy and chills), NAUSEA (Nauseated), FATIGUE (Overall just really tired) and PYREXIA (Felt feverish) had resolved. At the time of the report, VACCINATION SITE PAIN (Arm seriously sore and tight) was resolving.            This case concerns an adult female with serious unexpected syncope, and nonserious unexpected postural dizziness, fall, confusion state, asthenia, pain, decreased appetite, dehydration, cold sweat, and expected pyrexia, chills, fatigue, nausea, and vaccination site pain. Event onset 2 days after second dose mRNA-1273. Events resolving. Based on current available information and temporal association between use of the product and start date of the event, a causal relationship cannot be excluded.; Sender's Comments: This case concerns an adult female with serious unexpected syncope, and nonserious unexpected postural dizziness, fall, confusion state, asthenia, pain, decreased appetite, dehydration, cold sweat, and expected pyrexia, chills, fatigue, nausea, and vaccination site pain. Event onset 2 days after second dose mRNA-1273. Events resolving. Based on current available information and temporal association between use of the product and start date of the event, a causal relationship cannot be excluded.