could not hear anything from her right ear/lost hearing in right ear; something annoying her in right ear; This is a spontaneous report from a contactable consumer (patient). A 57-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Lot number was not reported), via an unspecified route of administration, administered in Arm Left on 12Apr2021 as 1st dose, single dose for COVID-19 immunization. Family medical history included mother is almost 90 and her hearing is bad, thinks it is age related. Her mother does not have total loss of hearing, her mother needed hearing aids after age 70 or 75. The patient's concomitant medications were not reported. No prior vaccinations within 4 weeks and no events prior to vaccination. The patient previously received an unspecified flu shot on Oct2020 at 56 years old for immunization. On 19Apr2021 21:00, the patient had something annoying her in right ear. She didn't pay too much attention to it because she could still hear. Then, she went to sleep. First thing in the morning when she woke up on 20Apr2021 07:00, she could not hear anything from her right ear. She suddenly lost her right ear hearing. She went to urgent care. Urgent care transferred her to the ear doctor. There, she got a hearing test at the ENT department. The ear doctor was suspicious because she had gotten her vaccine a week ago. Doctor was thinking it was probably a side effect so she would like to report this. She clarifies she doesn't know if it's a side effect. Right now she is still under treatment. ENT Doctor did a check, clarified as the inside of ear, and it's all normal. She had a hearing test on 20Apr2021 and no hearing at all from right ear. The doctor didn't know what happened so he ordered an MRI. She took the MRI test on 28Apr2021, the results were all normal. In the meantime, she took prednisone pills for the hearing loss. She explains the Prednisone did not help. She took the Prednisone about two weeks. Doctor said to come back and see him in two weeks after finishing the prescription of the Prednisone. The first 5 days, she was supposed to take 3 tablets daily. Then the second 5 days, she was supposed to take 2 tablets daily.  Then the last 5 days, she was supposed to take 1 tablet daily. On 03May2021, she went back to see the doctor and he gave her a injection in her ear since he had the MRI results and determined nothing was wrong on the inside of her ear. She clarifies it was a injection in her ear, still like Prednisone or a steroid, she thinks. The injection was to be for once a week for 3 weeks. She clarifies further she had the steroid injection 3 times total. After her second injection, she could hear a little bit of sound, it's a little bit, only some. Only sounds, not speech. She can hear a little bit of sounds if she covers her left ear. The patient had another hearing test on 21May2021 and hearing still really bad from right ear. She thinks the steroid injection shot in her ear really helped her and that's why she can hear a little bit of sound. Before, she could hear nothing. She thinks the name of the injection is Prednisone, she is not sure the name of it. She was supposed to get her second dose on 05May2021. On 03May2021, when she saw her doctor and asked the question whether or not she could get the second dose, the doctor said not to get second dose of the COVID vaccine yet. The outcome of the event could not hear anything from her right ear was recovering while for the event had something annoying her in right ear was unknown.  Information on the lot/batch number has been requested.