hives on her arms, legs, bottom of her feet, and face; She then felt feverish and had temperature of 101 for 2 days; fatigue; swollen, black and blue, and red area at the injection site; swollen, black and blue, and red area at the injection site; This spontaneous case was reported by a patient and describes the occurrence of VACCINATION SITE BRUISING (swollen, black and blue, and red area at the injection site), VACCINATION SITE SWELLING (swollen, black and blue, and red area at the injection site), URTICARIA (hives on her arms, legs, bottom of her feet, and face), PYREXIA (She then felt feverish and had temperature of 101 for 2 days) and FATIGUE (fatigue) in an elderly female patient who received mRNA-1273.815 (SPIKEVAX 2023-2024 PFS) (batch no. 209F23A) for COVID-19 prophylaxis.     The patient's past medical history included COVID-19 (Two times covid.).    On 17-Oct-2023, the patient received dose of mRNA-1273.815 (SPIKEVAX 2023-2024 PFS) (unknown route) 1 dosage form. On 18-Oct-2023, the patient experienced VACCINATION SITE BRUISING (swollen, black and blue, and red area at the injection site), VACCINATION SITE SWELLING (swollen, black and blue, and red area at the injection site), PYREXIA (She then felt feverish and had temperature of 101 for 2 days) and FATIGUE (fatigue). On 19-Oct-2023, the patient experienced URTICARIA (hives on her arms, legs, bottom of her feet, and face). The patient was treated with DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) at an unspecified dose and frequency and PARACETAMOL (TYLENOL) at an unspecified dose and frequency. At the time of the report, VACCINATION SITE BRUISING (swollen, black and blue, and red area at the injection site) and VACCINATION SITE SWELLING (swollen, black and blue, and red area at the injection site) outcome was unknown and URTICARIA (hives on her arms, legs, bottom of her feet, and face), PYREXIA (She then felt feverish and had temperature of 101 for 2 days) and FATIGUE (fatigue) was resolving.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 18-Oct-2023, Body temperature: 101.         The patient did not receive any other vaccines in the 4 weeks prior to COVID-19 vaccine. No concomitant medication was reported. The patient received previous Moderna COVID-19 vaccine dose on 5-MAR-2021 (lot number 025A21A) and on 26-FEB-2022 (lot number 026L21B).  On 18-Oct-2023, the patient had a swollen, black and blue, and red area at the injection site. The red area was as big as a cantaloupe and big as her whole arm. It was swollen, hard, and red. The patient then felt feverish and had temperature of 101 for 2 days. As the fever started to break, the patient woke up the next day and had hives on the arms, legs, bottom of the feet, and face. the patient hadn't had hives for 30 years prior. the patient went out and got Benadryl and started taking that. Fever started coming back. The patient also took Tylenol for the fever and had fatigue during the fever. The patient had COVID-19 one year ago. It was the patient's 3rd case of covid. It was not nearly as bad as this was.   This case was linked to US-MODERNATX, INC.-MOD-2023-747574 (E2B Linked Report).; Sender's Comments:  US-MODERNATX, INC.-MOD-2023-747574:Monovalent dose