feeling so bad; Initial information received on 21-Jan-2025 regarding an unsolicited valid non-serious case received from a Consumer/ Non-Healthcare Professional. This case involves an unknown age / gender patient who was feeling so bad after receiving influenza USP TRIVAL A-B high dose subvirion vaccine [Fluzone High Dose]. The patient’s past medical history, medical treatment(s), vaccination(s) and family history were not provided. On an unknown date, the patient received an unknown dose of influenza USP TRIVAL A-B high dose subvirion vaccine Suspension for injection in pre-filled syringe (strength, expiry date and lot number not reported) via unknown route in unknown administration site as prophylactic vaccination (Immunization). Information on the batch number was requested corresponding to the one at time of event occurrence. On an unknown date the patient feeling so bad (feeling abnormal) (unknown latency) following the administration of influenza USP TRIVAL A-B high dose subvirion vaccine. Reportedly, no additional information or specific symptoms were shared. Action taken was not applicable. It was not reported if the patient received a corrective treatment for the event. At time of reporting, the outcome was Unknown for the event.