2nd primary dose being given 6 months after first primary and Nurse intends to give Pfizer for 2nd dose today, 06JAN2023; Nurse states that they do not have Moderna Monovalent vaccine in stock for 6-11 year old age group./Nurse is asking, "Can we give Pfizer 6-11 year Monovalent COVID-19 Vaccine instead of Moderna brand for the 2nd primary dose?; No adverse event; This spontaneous case was reported by a nurse and describes the occurrence of PRODUCT ADMINISTRATION INTERRUPTED (2nd primary dose being given 6 months after first primary and Nurse intends to give Pfizer for 2nd dose today, 06JAN2023), PRODUCT AVAILABILITY ISSUE (Nurse states that they do not have Moderna Monovalent vaccine in stock for 6-11 year old age group./Nurse is asking, "Can we give Pfizer 6-11 year Monovalent COVID-19 Vaccine instead of Moderna brand for the 2nd primary dose?) and NO ADVERSE EVENT (No adverse event) in a 6-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 prophylaxis.     No Medical History information was reported.    In July 2022, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, the patient experienced PRODUCT ADMINISTRATION INTERRUPTED (2nd primary dose being given 6 months after first primary and Nurse intends to give Pfizer for 2nd dose today, 06JAN2023), PRODUCT AVAILABILITY ISSUE (Nurse states that they do not have Moderna Monovalent vaccine in stock for 6-11 year old age group./Nurse is asking, "Can we give Pfizer 6-11 year Monovalent COVID-19 Vaccine instead of Moderna brand for the 2nd primary dose?) and NO ADVERSE EVENT (No adverse event). At the time of the report, PRODUCT ADMINISTRATION INTERRUPTED (2nd primary dose being given 6 months after first primary and Nurse intends to give Pfizer for 2nd dose today, 06JAN2023), PRODUCT AVAILABILITY ISSUE (Nurse states that they do not have Moderna Monovalent vaccine in stock for 6-11 year old age group./Nurse is asking, "Can we give Pfizer 6-11 year Monovalent COVID-19 Vaccine instead of Moderna brand for the 2nd primary dose?) and NO ADVERSE EVENT (No adverse event) outcome was unknown.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter considered NO ADVERSE EVENT (No adverse event) to be not related. No further causality assessments were provided for PRODUCT ADMINISTRATION INTERRUPTED (2nd primary dose being given 6 months after first primary and Nurse intends to give Pfizer for 2nd dose today, 06JAN2023) and PRODUCT AVAILABILITY ISSUE (Nurse states that they do not have Moderna Monovalent vaccine in stock for 6-11 year old age group./Nurse is asking, "Can we give Pfizer 6-11 year Monovalent COVID-19 Vaccine instead of Moderna brand for the 2nd primary dose?).    Concomitant product use was not provided by the reporter.  It was reported 2nd primary dose being given 6 months after first primary and Nurse intends to give Pfizer for 2nd dose today 06-JAN-2023. a 5-year-old patient received first primary dose of Moderna COVID-19 vaccine in JUL2022. She is returning now and she turned 6-year-old on 30DEC2022. Nurse states that they do not have Moderna Monovalent vaccine in stock for 6-11 year old age group. She states that according to CDC, If the vaccine is not available or the patient refuses to go somewhere else, then Pfizer can be given for 2nd primary dose.  Treatment information was not provided.   Reporter did not allow further contact