Patient given Menquadfi as above at 1310 which was 3rd dose of meningoccal and should not have been administered. It was dicsovered after given. Immunization Program nurse notified by Nursing Supervisor that 3rd dose of meningoccal given after second given in 6/2024. Received word from DH Vaccine Program nurse that patient should not have negative outcome from extra dose but Dr would also be notified. Patient did not exhibit any adverse side effects while in clinic around 30-35 minutes when she left at 1345. Mom aware of extra dose as well as she was out in car when vaccine administered.