Had sore arm; I feel terrible today; Weakness; Loss of appetite; I wasn't able to do anything for a full day and a half when I started to feel better; Severe reaction with a half-dose of Moderna in contrast to experiencing no symptoms with the full dose Moderna shots 1 and 2; Chills/10 to 12 hours after my Moderna booster shot I woke up in the middle of the night with severe chills and used 3 down comforters the rest of the night; Full body aches; Temperature was 99.6°F; Headache; Complete exhaustion; Sick; This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (Had sore arm), FEELING ABNORMAL (I feel terrible today), ASTHENIA (Weakness), DECREASED APPETITE (Loss of appetite) and LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (I wasn't able to do anything for a full day and a half when I started to feel better) in a 77-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 026D21A, 030L20A and 013M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No medical history was provided by the reporter.  Previously administered products included for Product used for unknown indication: Flu (Route- shot Body site- arm) on 10-Jun-2021. Past adverse reactions to the above products included No adverse event with Flu. Concurrent medical conditions included Sulfonamide allergy and Osteoporosis since 03-Mar-2002. Concomitant products included DENOSUMAB (PROLIA) from 01-Jan-2012 to an unknown date and CALCIUM CITRATE, COLECALCIFEROL (CALCIUM CITRATE + D) from 01-Jan-1999 to an unknown date for Osteoporosis.   On 27-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 24-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 25-Oct-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 25-Oct-2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced ILLNESS (Sick). On 26-Oct-2021, the patient experienced PAIN IN EXTREMITY (Had sore arm), FEELING ABNORMAL (I feel terrible today), ASTHENIA (Weakness), DECREASED APPETITE (Loss of appetite), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (I wasn't able to do anything for a full day and a half when I started to feel better), VACCINATION COMPLICATION (Severe reaction with a half-dose of Moderna in contrast to experiencing no symptoms with the full dose Moderna shots 1 and 2), CHILLS (Chills/10 to 12 hours after my Moderna booster shot I woke up in the middle of the night with severe chills and used 3 down comforters the rest of the night), PAIN (Full body aches), PYREXIA (Temperature was 99.6°F), HEADACHE (Headache) and FATIGUE (Complete exhaustion). On 28-Oct-2021, PAIN IN EXTREMITY (Had sore arm), FEELING ABNORMAL (I feel terrible today), ASTHENIA (Weakness), DECREASED APPETITE (Loss of appetite), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (I wasn't able to do anything for a full day and a half when I started to feel better), ILLNESS (Sick), VACCINATION COMPLICATION (Severe reaction with a half-dose of Moderna in contrast to experiencing no symptoms with the full dose Moderna shots 1 and 2), CHILLS (Chills/10 to 12 hours after my Moderna booster shot I woke up in the middle of the night with severe chills and used 3 down comforters the rest of the night), PAIN (Full body aches), PYREXIA (Temperature was 99.6°F), HEADACHE (Headache) and FATIGUE (Complete exhaustion) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Body temperature: 99.6 (High) Body temperature 99.6 F. On an unknown date, Oxygen saturation: 96-97 (normal) normal.         Treatment details was not reported by the reporter.   This case was linked to MOD-2021-364323 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 29-Oct-2021: Follow up received on 29-Oct-2021 contains Significant: Patient demographic details added, medical history added, Concomitants added,additional events added updated.