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Report #2898460

Received Jun 1, 2026

A note on interpretation. VAERS reports are unverified and may be incomplete or coincidental. A report does not establish that a vaccine caused an event, and counts should not be used to calculate incidence or infer causation. Full disclaimer

Overview

Sex
Male
Age
9 yrs
State
IL
Recovered
Unknown
Vaccinated
Mar 11, 2026
Onset
May 18, 2026
Days to onset
68
Hospital days

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
MENMENINGOCOCCAL (NO BRAND NAME)UNKNOWN MANUFACTURERUNK

Symptoms (2)

Inappropriate schedule of product administrationNo adverse event

Symptom narrative

9 years old patient administering menquadfi with 2 months interval with no ae; Initial information received on 21-May-2026 regarding an unsolicited valid non-serious case received from a healthcare professional (HCP). This case involves a 9-year-old male patient who experienced administering Meningococcal A-C-Y-W135 (T Conj) Vaccine [Menquadfi] with 2 months interval with no adverse events. The patient's past medical history included hematopoietic cell transplantation. The patient's past drugs, vaccination(s), family history, and concomitant medications were not provided. Concomitant medication(s) included pneumococcal vaccine conjugate 7-valent (Prevnar) and diphtheria vaccine toxoid, haemophilus influenzae type b vaccine conjugate (meningococcal protein), hepatitis b vaccine HBsAg (yeast), pertussis vaccine acellular 5-component, polio vaccine inactivated 3-valent (Vero), tetanus vaccine toxoid (Vaxelis). On 11-Mar-2026, the patient received an unknown dose (dose 1) of Meningococcal A-C-Y-W135 (T Conj) Vaccine [Menquadfi], Solution for injection (batch: unknown, expiry: unknown) (strength: unknown) via unknown route for immunization [Immunisation]. On 18-MAY-2026, the patient received an unknown dose (dose 2) of Meningococcal A-C-Y-W135 (T Conj) Vaccine [Menquadfi], Solution for injection (batch: unknown, expiry: unknown) (strength: unknown) via unknown route for immunization [Immunisation]. The patient experienced administering menquadfi with 2 months interval with no adverse events (Off label uses, onset: 18-May-2026, latency: unknown). It was reported "Operations Manager asked a question about administration of Vaxelis to a 9-year-old patient. She asked for recommendations. She said that the patient had hematopoietic cell transplant, and it was recommended by the bone marrow transplant team for the patient to be re-immunized since he has high risk of infection from vaccine preventable diseases. Patients previously received Vaxelis, Menquadfi, Prevnar, and Havrix on 11-Mar=2026 which was outside of their organization. Patient came back for repeat immunization and their provider gave Vaxelis, Menquadfi, and Prevnar on 18-May-2026." Action taken: Not applicable.

Medical history

Medical History/Concurrent Conditions: Hematopoietic stem cell transplantation; Comments: NONE

Other medications

Prevnar; Vaxelis; Havrix