epilepsy; mind and your body aren't working together; body immune system is like looking for something to fight that isn't there; extreme fatigue; vertigo; This spontaneous case was reported by a patient and describes the occurrence of EPILEPSY (epilepsy) in a female patient of an unknown age who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 prophylaxis. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    In November 2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. In 2021, the patient experienced VERTIGO (vertigo), IMMUNE SYSTEM DISORDER (body immune system is like looking for something to fight that isn't there) and FATIGUE (extreme fatigue). In August 2022, the patient experienced FEELING ABNORMAL (mind and your body aren't working together). On an unknown date, the patient experienced EPILEPSY (epilepsy) (seriousness criterion medically significant). At the time of the report, EPILEPSY (epilepsy), VERTIGO (vertigo), FEELING ABNORMAL (mind and your body aren't working together) and FATIGUE (extreme fatigue) outcome was unknown and IMMUNE SYSTEM DISORDER (body immune system is like looking for something to fight that isn't there) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Blood test: blood work was perfect.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Concomitant products were not provided. Treatment medication were not reported.  The patient received 1st booster on Nov 21. On an unknown date in //2021 (reported as for the last 10 months), patient experienced extreme fatigue, vertigo and "a few small minor things that are followed by specialists". The patient's mentioned her blood work was perfect. The patient mentioned that suddenly, 2.5 weeks ago (on an unknown date in Aug/2022). The patient was in cloud all the time with the fatigue, and it felt like mind and body weren't working together. It was like lifted and gone. So, the patient thought, possibly, in the last nine months (unspecified dates in 2021), patient's body immune system was like looking for something to fight that isn't there. And then it finally gave up and went back to being a normal immune system. The patient was schedule to have her second booster dose tomorrow 19/Aug/2022 and she was afraid "Because she finally was feeling like a whole person." The patient stated, "First booster messed up her immune system". The patient was feeling better.  The patient mentioned that "This was her theory that her second booster did something to her immune system. It was like fighting something that wasn't there, and then it finally gave up. So, the patient asked her internist. She's an immunologist. Patient's HCP (Healthcare Professional) told the patient that the patient should wait and just get the new booster with the other stuff. The patient should go to the hospital next month to "Wire her brain again" and that she had "some brain processing things" and she had epilepsy. The patient mentioned that "First booster messed up her immune system and going through that again, versus having more protection being in a hospital and environment, and the third element was that the patient understood by October there was going to be a new booster that had something to cover the new strain. The patient wanted to know if she should take the booster now or wait to the new booster.  Company Comment : This is a spontaneous case concerning a female patient of an unknown age with no reported medical history, who experienced the unexpected, serious, adverse event of special interest, Epilepsy which was medically significant and occurred on an unknown date after receiving the third dose of mRNA-1273 Vaccine. No further information on risk factors, co morbidities, clinical course and management of the event was available in the report. The reported outcome of the event was unknown. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report.   This case was linked to MOD-2021-048164 (Patient Link).; Sender's Comments: This is a spontaneous case concerning a female patient of an unknown age with no reported medical history, who experienced the unexpected, serious, adverse event of special interest, Epilepsy which was medically significant and occurred on an unknown date after receiving the third dose of mRNA-1273 Vaccine. No further information on risk factors, co morbidities, clinical course and management of the event was available in the report. The reported outcome of the event was unknown. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report.