This spontaneous case was reported by a consumer and describes the occurrence of COVID-19 (COVID-19), INFLUENZA LIKE ILLNESS (Flu like Symptoms) and INTERCHANGE OF VACCINE PRODUCTS (1st dose of Pfizer COVID-19 vaccine & Patient ended up receiving 2nd dose on 02Sep2021 from Moderna COVID-19 vaccine) in a  patient of an unknown age and gender who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. Previously administered products included for Product used for unknown indication: Pfizer COVID-19 Vaccine (it took them long to recover from the vaccine). Past adverse reactions to the above products included Vaccination complication with Pfizer COVID-19 Vaccine. On 09-Sep-2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 09-Sep-2021, the patient experienced INTERCHANGE OF VACCINE PRODUCTS (1st dose of Pfizer COVID-19 vaccine & Patient ended up receiving 2nd dose on 02Sep2021 from Moderna COVID-19 vaccine). On 02-Jan-2022, the patient experienced COVID-19 (COVID-19). On an unknown date, the patient experienced INFLUENZA LIKE ILLNESS (Flu like Symptoms). On 09-Sep-2021, INTERCHANGE OF VACCINE PRODUCTS (1st dose of Pfizer COVID-19 vaccine & Patient ended up receiving 2nd dose on 02Sep2021 from Moderna COVID-19 vaccine) had resolved. At the time of the report, COVID-19 (COVID-19) outcome was unknown and INFLUENZA LIKE ILLNESS (Flu like Symptoms) had resolved. DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 02-Jan-2022, SARS-CoV-2 test: positive (Positive) patient tested positive with COVID-19. No Concomitant product use was reported. The patient stated that they received 1st dose of Pfizer COVID-19 vaccine which ruined their life, and it took them long to recover from the vaccine. The patient did not end up receiving 2nd dose of the Pfizer COVID-19 vaccine. The patient then reached out to their local Pharmacist at the pharmacy who recommended to get the 2nd dose from Moderna COVID-19 vaccine. The patient ended up receiving 2nd dose on 02-Sep-2021 and just experienced flu like symptoms and then they were fine. And then on 02-Jan-2022, the patient tested positive with COVID-19 and was sick for few days only. It was also reported that the second dose date, 09-Sep-2021 of Moderna COVID-19 Vaccine. No treatment information was provided. Company Comment: This spontaneous case concerns a patient with unknown age and gender, initially vaccinated with Covid 19 vaccine Pfizer reported adverse event was Vaccine complication, who experienced non-serious, unexpected, AESI event of Covid 19 which occurred 3 months 25 days post vaccination with the 2nd dose of mRNA-1273 vaccine (Moderna Covid 19 vaccine ). This was accompanied by other non-serious, unexpected events of influenza like illness and interchange of vaccine products. The re-challenge for this case is not applicable since the outcome of events is unknown. The vaccination with Covid 19 vaccine Pfizer is a confounder for this case. The benefit -risk relationship of mRNA -1273 (Moderna Covid 19 Vaccine) is not affected by this report. Reporter did not allow further contact. Sender's Comments: This spontaneous case concerns a patient with unknown age and gender, initially vaccinated with Covid-19 vaccine Pfizer reported adverse event was Vaccine complication, who experienced non-serious, unexpected, AESI event of Covid-19 which occurred 3 months 25 days post vaccination with the 2nd dose of mRNA-1273 vaccine (Moderna Covid 19 vaccine). This was accompanied by other non-serious, unexpected events of influenza like illness and interchange of vaccine products. The re-challenge for this case is not applicable since the outcome of events is unknown. The vaccination with Covid-19 vaccine Pfizer is a confounder for this case. The benefit -risk relationship of mRNA -1273 (Moderna Covid-19 Vaccine) is not affected by this report.