Being able to talk with dead people, hearing people drumming outside his house' and the constant voice of a co-worker whom he believed to be a paramour- it was later confirmed that there was no romantic relationship/ auditory hallucinations; Superficial and grandiose/ grandiose delusions of becoming clairvoyant; Erotomaniac delusions; Anxious; This literature-non-study case was reported in a literature article and describes the occurrence of HALLUCINATION, AUDITORY (Being able to talk with dead people, hearing people drumming outside his house' and the constant voice of a co-worker whom he believed to be a paramour- it was later confirmed that there was no romantic relationship/ auditory hallucinations) in a 31-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.   LITERATURE REFERENCE: Can new onset psychosis occur after mRNA based COVID-19 vaccine administration? A case report. Psychiatry Res. 2021;304:114165     Concurrent medical conditions included Schizotypal personality disorder (strongly associated with the development of schizophrenia).    On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced HALLUCINATION, AUDITORY (Being able to talk with dead people, hearing people drumming outside his house' and the constant voice of a co-worker whom he believed to be a paramour- it was later confirmed that there was no romantic relationship/ auditory hallucinations) (seriousness criterion medically significant), DELUSION OF GRANDEUR (Superficial and grandiose/ grandiose delusions of becoming clairvoyant), DELUSIONAL DISORDER, EROTOMANIC TYPE (Erotomaniac delusions) and ANXIETY (Anxious). At the time of the report, HALLUCINATION, AUDITORY (Being able to talk with dead people, hearing people drumming outside his house' and the constant voice of a co-worker whom he believed to be a paramour- it was later confirmed that there was no romantic relationship/ auditory hallucinations), DELUSION OF GRANDEUR (Superficial and grandiose/ grandiose delusions of becoming clairvoyant), DELUSIONAL DISORDER, EROTOMANIC TYPE (Erotomaniac delusions) and ANXIETY (Anxious) had not resolved.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter considered HALLUCINATION, AUDITORY (Being able to talk with dead people, hearing people drumming outside his house' and the constant voice of a co-worker whom he believed to be a paramour- it was later confirmed that there was no romantic relationship/ auditory hallucinations), DELUSION OF GRANDEUR (Superficial and grandiose/ grandiose delusions of becoming clairvoyant), DELUSIONAL DISORDER, EROTOMANIC TYPE (Erotomaniac delusions) and ANXIETY (Anxious) to be possibly related.    Concomitant medications were not provided.  Previously, he was asymptomatic, working full-time as an office manager. Although functional adolescence and adulthood, he described himself as a loner, with an inclination to overly spiritual ideas, and able to communicate directly with God.  Treatment information was not reported.  Based on the current available information and temporal association between the use of the product and the events, a causal relationship cannot be excluded.  Event terms, onset dates and outcomes captured per SD.  Events seriousness per provided list.   This case was linked to MOD-2021-291121 (Patient Link).; Sender's Comments: Based on the current available information and temporal association between the use of the product and the events, a causal relationship cannot be excluded.  Event terms, onset dates and outcomes captured per SD.  Events seriousness per provided list.