Sex: U
Vaccine: FLU3
Symptoms: Asthenia, Chills, Hyperhidrosis, Loss of consciousness, Syncope
Clinical narrative: promptly passed out/collapsed/unconscious; around midnight woke up with chills and sweats; around midnight woke up with chills and sweats; feeling very weak/patient ended up going to bed four times the following day, lost most of the second day and part of the third; Initial information received on 19-Nov-2024 regarding an unsolicited valid serious case received from a consumer/non-hcp (non-healthcare professional).  This case is linked to US-SA-2024SA346272  This case involves an unknown age and unknown gender patient who promptly passed out/collapsed/unconscious, around midnight woke up with chills and sweats, and feeling very weak/patient ended up going to bed four times the following day, lost most of the second day and part of the third 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 in Sep-2024, the patient received a  dose of suspect Influenza Usp Trival A-B High Dose Subvirion Vaccine Suspension for injection in pre-filled syringe (lot UT8437AA) (with an unknown strength, expiry date) via unknown route in unknown administration site for prophylactic vaccination (immunization).  On an unknown date in Sep-2024, the patient promptly passed out/collapsed/unconscious (loss of consciousness), around midnight woke up with chills and sweats (chills) (night sweats) and feeling very weak/patient ended up going to bed four times the following day, lost most of the second day and part of the third (asthenia) (latency- same day) following the administration of Influenza Usp Trival A-B High Dose Subvirion Vaccine.  Reportedly, patient was tottered into the kitchen where he/she  promptly passed out/collapsed/unconscious. Patient does not know for how long, it was between 5 and 30 minutes. This was the first time patient was passed out from any medication or injury.    Action taken was not applicable.  It was not reported if the patient received a corrective treatment for the events.  At time of reporting, the outcome was Recovered / Resolved on an unknown date in 2024 for the event loss of consciousness and Asthenia and was Unknown for the events chills and night sweats.  Seriousness criteria: medically significant for the event loss of consciousness.; Sender's Comments: Sanofi company comment dated 26-NOV-2024: This case involves an unknown age and unknown gender patient who promptly passed out/collapsed/unconscious, around midnight woke up with chills and sweats, and feeling very weak/patient ended up going to bed four times the following day, lost most of the second day and part of the third after receiving Influenza Usp Trival A-B High Dose Subvirion Vaccine [Fluzone High Dose].Further information regarding allergic history, medical history, concomitant medication and tolerance, laboratory investigations excluding alternative etiologies for the reported event are needed to fully assess this case. Based upon the reported information, the role of the suspect vaccine cannot be assessed. US-SA-2024SA346272: