Lack of efficacy; tested positive for COVID/still had COVID symptoms; This spontaneous case was reported by an other health care professional and describes the occurrence of DRUG INEFFECTIVE (Lack of efficacy) and COVID-19 (tested positive for COVID/still had COVID symptoms) in a 63-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 047B21A and 034C21A) for COVID-19 vaccination.     No Medical History information was reported.   On 14-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 12-May-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 23-Dec-2021, the patient experienced DRUG INEFFECTIVE (Lack of efficacy) and COVID-19 (tested positive for COVID/still had COVID symptoms). At the time of the report, DRUG INEFFECTIVE (Lack of efficacy) and COVID-19 (tested positive for COVID/still had COVID symptoms) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 23-Dec-2021, SARS-CoV-2 test: positive (Positive) Positive. On 26-Dec-2021, SARS-CoV-2 test: positive (Positive) positive.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No concomitant medication and treatment information was reported. The patient tested positive for COVID on 23-Dec-2021 via the quick view test. The patient had a booster dose appointment that was scheduled on 27-Dec-2021 which the patient called off as the patient still had COVID symptoms. The patient reported that the patient got tested again on 26-Dec-2021 and was tested positive. The patient reported about experiencing the side effects got shaky, runny nose, could not stop shaking, cold chills, scuffy throat, throat was raw and dry, fatigue and the patient's life had been miserable for last 5 days. The patient queried whether the patient needed a booster dose after getting infected and hated getting additional immunity. Patient tested positive twice in the last week including a lab test and queried how could he said which variant did have Delta or Omicron.  This is a spontaneous case concerning  a  63-year-old, male patient with no relevant medical history, who experienced the unexpected non-serious event of Drug Ineffective and Covid-19 as an added event. The events occurred approximately 7 months after the second dose of mRNA-1273 COVID 19 Vaccine. The rechallenge was unknown since no information about the first dose was disclosed. The events outcome were reported as unknown. The benefit-risk relationship of mRNA-1273 COVID 19 Vaccine, is not affected by this report.   Most recent FOLLOW-UP information incorporated above includes: On 27-Dec-2021: Narrative updated. On 30-Dec-2021: Added lab data.; Sender's Comments: This is a spontaneous case concerning  a  63-year-old, male patient with no relevant medical history, who experienced the unexpected non-serious event of Drug Ineffective and Covid-19 as an added event. The events occurred approximately 7 months after the second dose of mRNA-1273 COVID 19 Vaccine. The rechallenge was unknown since no information about the first dose was disclosed. The events outcome were reported as unknown. The benefit-risk relationship of mRNA-1273 COVID 19 Vaccine, is not affected by this report.