He is raising questions about this side effect from the vaccine and suggesting more research is needed.

A vaccinologist at the Mayo Clinic in Minnesota said he developed tinnitus after his second dose of an mRNA COVID-19 vaccine.

Dr. Gregory Poland's symptoms began 90 minutes after receiving the vaccine. He described the condition as "fairly severe" and "extraordinarily bothersome, interfering with sleep and the ability to concentrate."

Tinnitus is defined as hearing sounds when no actual, external sounds are present. Some people report:

Ringing in the ears.

Buzzing, hissing, whistling, swooshing and clicking.

Thumping.

Hearing music when none is being played.

According to data released March 4 by the Vaccine Adverse Event Reporting System (VAERS), 19,630 people have reported developing tinnitus after a COVID vaccine. There are no VAERS data on whether or not this condition resolved or is ongoing.

A Dec. 14, 2021 Johnson & Johnson (J&J) "Fact Sheet for Recipients and Caregivers" lists tinnitus as a side effect of the Janssen COVID vaccine, marketed by J&J.