After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later; After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later; This spontaneous case was reported by a patient and describes the occurrence of COVID-19 (After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later) and DRUG INEFFECTIVE (After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later) in a 70-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 051f21a) for COVID-19 vaccination.  Concurrent medical conditions included Asthma, Hypertension and Drug allergy (Unspecified drug).  On 10-Nov-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 13-May-2022, the patient experienced COVID-19 (After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later) and DRUG INEFFECTIVE (After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later). The patient was treated with NIRMATRELVIR, RITONAVIR (PAXLOVID) from 04-May-2022 to 08-May-2022 for COVID-19, at a dose of 1 dosage form. At the time of the report, COVID-19 (After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later) was resolving and DRUG INEFFECTIVE (After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16 day shift later) outcome was unknown.  DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 13-May-2022, SARS-CoV-2 test: positive (Positive) Covid rebound. In May 2022, SARS-CoV-2 test: still positive (Positive) Still positive 16 day shift later.  The patient did not had any other medications/products within 2 weeks of starting COVID-19 treatment. After completing paxlovid patient felt good but 5 days later had covid rebound. Patient still positive 16 day shift later. Device date was 19-May-2022. Treatment received reported as no.  Company comment: This is a spontaneous case concerning a 70-years-old female patient with no relevant medical history, who experienced the unexpected non-serious adverse events of special interest, COVID-19 (COVID-19) and unexpected nonserious event of drug ineffective, which occurred 6 months 3 days after receiving the third dose of mRNA-1273 vaccine. The event COVID was reported as; After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16-day shift later. The patient was treated with NIRMATRELVIR, RITONAVIR (PAXLOVID) from 04-May-2022 to 08-May-2022 for COVID-19, at an unspecified dose and frequency.  SARS-CoV-2 test was positive as on 13-May-2022. Ongoing Covid 19 pandemia could be considered as confounder to the event. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report. Event seriousness assessed as per medical judgement.; Sender's Comments: This is a spontaneous case concerning a 70-years-old female patient with no relevant medical history, who experienced the unexpected non-serious adverse events of special interest, COVID-19 (COVID-19) and unexpected nonserious event of drug ineffective, which occurred 6 months 3 days after receiving the third dose of mRNA-1273 vaccine. The event COVID was reported as; After completing paxlovid I felt good but 5 days later had covid rebound. Still positive 16-day shift later. The patient was treated with NIRMATRELVIR, RITONAVIR (PAXLOVID) from 04-May-2022 to 08-May-2022 for COVID-19, at an unspecified dose and frequency.  SARS-CoV-2 test was positive as on 13-May-2022. Ongoing Covid 19 pandemia could be considered as confounder to the event. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report. Event seriousness assessed as per medical judgement.