Interchange of vaccine products; patient tested positive for Covid-19; This spontaneous case was reported by an other health care professional and describes the occurrence of COVID-19 (patient tested positive for Covid-19) and INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products) in a 46-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for Prophylactic vaccination.    Co-suspect product included non-company product COVID-19 VACCINE NRVV AD26 (JNJ 78436735) (JANSSEN COVID-19 VACCINE) for Prophylactic vaccination.    No Medical History information was reported.   On 07-Mar-2021, the patient received first dose of COVID-19 VACCINE NRVV AD26 (JNJ 78436735) (JANSSEN COVID-19 VACCINE) (unknown route) 1 dosage form. On an unknown date, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 15-Dec-2021, the patient experienced COVID-19 (patient tested positive for Covid-19). On an unknown date, the patient experienced INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products). At the time of the report, COVID-19 (patient tested positive for Covid-19) had not resolved and INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 15-Dec-2021, SARS-CoV-2 test: positive (Positive) Positive. On an unknown date, SARS-CoV-2 test: positive (Positive) positive.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   No concomitant medications were reported.  No treatment medications were reported.  Company Comment: This spontaneous case concerns a 46 year old male with no medical history reported,  initially vaccinated with Covid 19 vaccine Janssen , who experienced non-serious, unexpected, AESI event of Covid 19 which occurred on Dec. 15 , 2021 post vaccination with the booster dose of mRNA-1273 vaccine ( date of vaccination was not reported) . The re-challenge for this case is not applicable since the event happened after the booster dose and no additional doses will be given and also the event outcome is not resolved. The history of vaccination withCovid 19 vaccine Janssen is a confounder for this case.  The benefit -risk relationship of mRNA -1273 ( Moderna Covid 19 Vaccine) is not affected by this report.; Sender's Comments: This spontaneous case concerns a 46 year old male with no medical history reported,  initially vaccinated with Covid 19 vaccine Janssen , who experienced non-serious, unexpected, AESI event of Covid 19 which occurred on Dec. 15 , 2021 post vaccination with the booster dose of mRNA-1273 vaccine ( date of vaccination was not reported) . The re-challenge for this case is not applicable since the event happened after the booster dose and no additional doses will be given and also the event outcome is not resolved. The history of vaccination withCovid 19 vaccine Janssen is a confounder for this case.  The benefit -risk relationship of mRNA -1273 ( Moderna Covid 19 Vaccine) is not affected by this report.