Age: 3.0
Sex: U
Vaccine: COVID19, COVID19
Symptoms: COVID-19 immunisation, Interchange of vaccine products, No adverse event
Clinical narrative: previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer; previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer; patient did not experienced any AEs; This spontaneous case was reported by a physician and describes the occurrence of INTERCHANGE OF VACCINE PRODUCTS (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer), COVID-19 IMMUNISATION (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer) and NO ADVERSE EVENT (patient did not experienced any AEs) in a 3-year-old patient of an unknown gender who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 prophylaxis.    Co-suspect product included non-company product TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for an unknown indication.    No Medical History information was reported.   On an unknown date, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form On an unknown date, received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. and third dose of TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) (unknown route) 1 dosage form. On an unknown date, the patient experienced INTERCHANGE OF VACCINE PRODUCTS (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer), COVID-19 IMMUNISATION (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer) and NO ADVERSE EVENT (patient did not experienced any AEs). At the time of the report, INTERCHANGE OF VACCINE PRODUCTS (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer), COVID-19 IMMUNISATION (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer) and NO ADVERSE EVENT (patient did not experienced any AEs) outcome was unknown.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter considered NO ADVERSE EVENT (patient did not experienced any AEs) to be not related. No further causality assessments were provided for INTERCHANGE OF VACCINE PRODUCTS (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer) and COVID-19 IMMUNISATION (previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer).    No concomitant medications were reported. It was reported that a 3 year old patient who previously received 2 doses of Moderna COVID-19 Vaccine accidentally received a 3rd dose of the primary series from Pfizer instead of receiving 1 bivalent booster from Moderna. Pfizer third dose was given to immunocompromised individuals. No treatment information was provided.   Reporter did not allow further contact