patient was supposed to receive FLUCELVAX, but was mistakenly administered FLUBLOK for ages 18 and older.; a 2 year old patient mistakenly administered FLUBLOK for ages 18 and older.; Initial information received on 24-Feb-2022 regarding an unsolicited valid non-serious case received from a other health professional.  This case involves a 2 years old and unknown gender patient who experienced a 2 year old patient mistakenly administered flublok for ages 18 and older. and patient was supposed to receive flucelvax, but was mistakenly administered flublok for ages 18 and older. while receiving vaccines influenza vaccine (Quadrivalent) and influenza quadrivalent recombinant vaccine (Flublok QIV).  The patient's past medical history, medical treatment(s), vaccination(s) and family history were not provided.   On 15-Dec-2021, the patient received a dose of suspect influenza quadrivalent recombinant vaccine at a dose of 0.5 ml with lot QFAA2108 via intramuscular route in left thigh for Prophylactic vaccination (Immunization).  On an unknown date, the patient received a dose of suspect influenza vaccine (Quadrivalent) produced by unknown manufacturer (dose: unknown) lot QFAA2108 and expiry date: 30-May-2022 via intramuscular route in unknown administration site for Prophylactic vaccination (Immunization).  On 15-Dec-2021 the patient developed a non-serious "a 2 year old patient mistakenly administered flublok for ages 18 and older. (Accidental exposure to product)" (unknown latency) following the administration of influenza quadrivalent recombinant vaccine and influenza vaccine (Quadrivalent).  On an unknown date the patient developed a non-serious "patient was supposed to receive flucelvax, but was mistakenly administered flublok for ages 18 and older. (product administered to patient of inappropriate age)" (unknown latency) following the administration of influenza quadrivalent recombinant vaccine and influenza vaccine (Quadrivalent).  It was reported that "a 2-year-old who received FLUBLOK in error. The caller reported that the consumer was prescribed Flucelvax; that the event was brought to the clinics attention from an come internal error audit and that the event occurred possibly due to the product is removed from the packaging and sent from their pharmacy in a bag. Note: Caller stated that they had a 2-year-old patient come in for an egg free flu vaccine. Caller stated that the patient was supposed to receive FLUCELVAX but was mistakenly administered FLUBLOK for ages 18 and older. Caller stated that the father of the patient has concerns about long term side effects this might have on child".   Action taken: not applicable.  It was not reported if the patient received a corrective treatment for the events (a 2 year old patient mistakenly administered FLUBLOK for ages 18 and older., patient was supposed to receive FLUCELVAX, but was mistakenly administered FLUBLOK for ages 18 and older.).  At time of reporting, the outcome was Unknown for the event a 2 year old patient mistakenly administered flublok for ages 18 and older. and was Unknown for the event patient was supposed to receive flucelvax, but was mistakenly administered flublok for ages 18 and older..  This suspected adverse reaction report is submitted and classified as a medication error solely and exclusively to ensure the marketing authorization holder's compliance with the requirements set out in the Directive 2001/83/EC and Module VI of the Good Pharmacovigilance Practices. The classification as a medical error is in no way intended, nor should it be interpreted or construed as an allegation or claim made by the marketing authorization holder that any third party has contributed to or is to be held liable for the occurrence of this medication error.