loss of hearing/hearing completely gone in right ear; Ringing in left ear; probably vertigo; Extreme dizziness; blood pressure was 214/113; vomitng; Weakness; nasal drip; dry scaly rash on his temples, neck, shoulders, belt line, and back of his right knee; diminished hearing in left ear/sounds like listening through a drum; pressure in temples like a hammer on each side of head; headache in back of head; A spontaneous report was received from a consumer who was also an 84-year-old male patient who received Moderna's COVID-19 vaccine (mRNA-1273) and experienced extreme dizziness, nausea ,vomiting, nasal drip, weakness, loss of hearing/hearing completely gone in right ear (deafness unilateral), diminished hearing in left ear/sounds like listening through a drum (hypoacusis), blood pressure was 214/113 (blood pressure increased), pressure in temples like a hammer on each side of head (head pressure), headache in back of head, and dry scaly rash on his temples, neck, shoulders, belt line, and back of his right knee.  The patient's medical history was not provided.  Concomitant product use was not provided.  On 28 Jan 2021, prior to the onset of the events, the patient received their first of two planned doses of mRNA-1273 (lot/batch: 020L20A) intramuscularly in the right arm for prophylaxis of COVID-19 infection.   The patient reported he felt fine for about one week after the vaccination.  Then, in the early morning of 05 Feb 2021, right after midnight, he experienced extreme dizziness, vomiting, weakness, nasal drip, and loss of hearing including ringing in his left ear and no sound in his right ear.  He also started to notice a dry scaly rash on his temples, neck, shoulders, belt line, and back of his right knee.  The patient was taken by ambulance to the hospital.   In the ambulance, he vomited and his blood pressure was 214/113.  He was placed the COVID-19 wing of the emergency room (ER) and given tests including a COVID-19 test, sonogram, "echogram", MRI, and EKG (results not provided).  The patient reported he was admitted to the hospital.  He was told he probably had vertigo. After his ER visit, the patient had appointments with his general practitioner, an ear nose and throat specialist, and a hearing specialist.  He was told his hearing was completely gone in his right ear and diminished in his left ear.  The patient could still somewhat hear out of his left ear but it sounds like listening through a drum. He states he has to have his television up very loud to be able to hear it.  At the time of this report, the patient continued to feel extremely weak, dizzy, and he had pressure in temples like a hammer on each side of his head, a headache in back of his head, and the hearing changes.    Treatment for the events included unspecified medications in the ER.  Action taken with mRNA-1273 in response to the events was not reported.   The events of dizziness, weakness, loss of hearing/hearing completely gone in right ear, vertigo,  weakness, diminished hearing in left ear/sounds like listening through a drum, pressure in temples like a hammer on each side of head, and headache in back of head were not resolved at the time of this report.  The outcome of the events of blood pressure was 214/113, nausea, nasal drip, vomiting, and dry scaly rash on his temples, neck, shoulders, belt line, and back of his right knee was unknown.; Reporter's Comments: This case concerns an 84 year old, male patient, who experienced a serious unexpected event of Deafness (unilateral) among others, 9 days after receiving 1st dose of mRNA- 1273 (Lot# 020L20A). Very limited information regarding this event has been provided at this time. Further information has been requested.