Hallucinations; Feeling hot; Feeling cold; Generalised joint pains; This spontaneous case was reported by a consumer and describes the occurrence of HALLUCINATION (Hallucinations) in an adult male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.    Co-suspect product included non-company product UPADACITINIB (RINVOQ) for Rheumatoid arthritis.    The patient's past medical history included Surgery. Concurrent medical conditions included Rheumatoid arthritis.   On an unknown date, the patient received dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form and UPADACITINIB (RINVOQ) (Oral) 1 UNK. On an unknown date, the patient experienced HALLUCINATION (Hallucinations) (seriousness criterion medically significant), FEELING HOT (Feeling hot), FEELING COLD (Feeling cold) and ARTHRALGIA (Generalised joint pains). At the time of the report, HALLUCINATION (Hallucinations), FEELING HOT (Feeling hot), FEELING COLD (Feeling cold) and ARTHRALGIA (Generalised joint pains) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       No relevant concomitant medications were reported.   The patient was still struggling after surgery as of 01 Sep 2021, continued to work out and exercise. Patient took the booster shot for covid and felt really bad hallucinations, hot, cold and every joint in his body ached for 24 hours.  It was unknown if patient was enrolled in a covid-19 vaccine trial.   Patient received booster shot of covid-19 vaccine manufactured by Moderna.  The reporters causality for events hallucinations, feeling hot, feeling cold, generalised joint pains with rinvoq was not reported and causality as per manufacturer was no reasonable possibility.   This case was identified as part of a retrospective clean-up activity where certain emails received in the Moderna mailbox were missed to be booked-in.  No treatment information was provided.  Company comment-This spontaneous case concerns an adult male patient of unspecified age with no relevant medical history reported, who experienced the unexpected serious (medically significant) event of Hallucination in the context of mRNA-1273 vaccine(booster dose).  Latency cannot be assessed since vaccination date was not disclosed. Patient was still struggling after surgery as of 1-Sep-2021,after booster shot for covid felt really bad hallucinations, feelings of hot and cold and arthralgia lasting for 24 hours. No further information on risk factors, concurrent illness, detailed clinical course, investigations, treatment of the events and details pertaining to the previous doses was available in the report. Outcome of the event Hallucination  was not known at the time of report. 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 spontaneous case concerns an adult male patient of unspecified age with no relevant medical history reported, who experienced the unexpected serious (medically significant) event of Hallucination in the context of mRNA-1273 vaccine(booster dose).  Latency cannot be assessed since vaccination date was not disclosed. Patient was still struggling after surgery as of 1-Sep-2021,after booster shot for covid felt really bad hallucinations, feelings of hot and cold and arthralgia lasting for 24 hours. No further information on risk factors, concurrent illness, detailed clinical course, investigations, treatment of the events and details pertaining to the previous doses was available in the report. Outcome of the event Hallucination  was not known at the time of report. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report. Event seriousness assessed as per medical judgement..