ill -since days after this booster; "Booster" felt fatigue crashed and went to bed/extremely tired continued sudden onset every afternoon/minor problem with being tired it passed; my platelets are just a bit low; weak/mostly stayed on the couch. ; got very tired; Lack of appetite; Monday morning tired had to take a nap; loss of appetite; this was a severe fatigue; Minor fever/ Fever 99F-100F; This spontaneous case was reported by a consumer and describes the occurrence of DECREASED APPETITE (Lack of appetite), ILLNESS (ill -since days after this booster), FATIGUE ("Booster" felt fatigue crashed and went to bed/extremely tired continued sudden onset every afternoon/minor problem with being tired it passed), FATIGUE (got very tired) and FATIGUE (Monday morning tired had to take a nap) in a 72-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 939901) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 27-Aug-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. In August 2021, the patient experienced DECREASED APPETITE (loss of appetite), FATIGUE (this was a severe fatigue) and PYREXIA (Minor fever/ Fever 99F-100F). On 30-Aug-2021, the patient experienced FATIGUE (Monday morning tired had to take a nap). On 04-Sep-2021, the patient experienced DECREASED APPETITE (Lack of appetite), FATIGUE (got very tired) and ASTHENIA (weak/mostly stayed on the couch. ). On an unknown date, the patient experienced ILLNESS (ill -since days after this booster), FATIGUE ("Booster" felt fatigue crashed and went to bed/extremely tired continued sudden onset every afternoon/minor problem with being tired it passed) and PLATELET COUNT DECREASED (my platelets are just a bit low). The patient was treated with PARACETAMOL (TYLENOL) on 04-Sep-2021 for Fever, at an unspecified dose and frequency and Bed rest for Fatigue. On 04-Sep-2021, FATIGUE (Monday morning tired had to take a nap) and FATIGUE (this was a severe fatigue) had not resolved. At the time of the report, DECREASED APPETITE (Lack of appetite), ILLNESS (ill -since days after this booster), FATIGUE ("Booster" felt fatigue crashed and went to bed/extremely tired continued sudden onset every afternoon/minor problem with being tired it passed) and FATIGUE (got very tired) had not resolved, DECREASED APPETITE (loss of appetite), PLATELET COUNT DECREASED (my platelets are just a bit low) and ASTHENIA (weak/mostly stayed on the couch. ) outcome was unknown and PYREXIA (Minor fever/ Fever 99F-100F) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 04-Sep-2021, Body temperature: 99-100 (High) High. In September 2021, SARS-CoV-2 test: negative (Negative) negative. On an unknown date, Antibody test: high (High) my antibody count is high . On an unknown date, Platelet count: low (Low) my platelets are just a bit low. .     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Patient  went to the doctor, and she was doing a lot of tests. The third vaccine side effects occurred within 24 hours of receiving it ,she stated that she never takes naps. She felt like something she ever usually feels. She has been to Dr and had lots of blood work has been done.They say its like she is fighing a virus but can not see what. She has No fever no digestive or heart or lung issues.  Concomitant medications were not provided.   This case was linked to MOD-2021-314933.   Most recent FOLLOW-UP information incorporated above includes: On 16-Sep-2021: Significant follow up appended- Events added, Batch no corrected.,Patient initials and pregnancy status added. Lab tests added.