0.5mL of an adult Havrix dose to a 16 year old female patient; This non-serious case was reported by a other health professional via call center representative and described the occurrence of adult product administered to child in a 16-year-old female patient who received HAV (Havrix adult) (batch number 2345B, expiry date 02-FEB-2026) for prophylaxis. On 02-DEC-2024, the patient received the 2nd dose of Havrix adult. On 02-DEC-2024, an unknown time after receiving Havrix adult, the patient experienced adult product administered to child (Verbatim: 0.5mL of an adult Havrix dose to a 16 year old female patient). The outcome of the adult product administered to child was unknown. Additional Information: GSK receipt date: 08-JAN-2025 The physician reported that 0.5mL of an adult Havrix dose to a 16 year old female patient because they did not stock the pediatric formulation in the office, which led to adult product administered to child.