Most vaccine trials don't report participants' ethnicities

Two-thirds of vaccine clinical trials conducted in the past 10 years have not reported participants' ethnicities, according to research published Feb. 19 in JAMA Network Open.

Researchers examined 230 vaccine clinical trials from July 2011 through June 2020. They found that 40 percent of these trials did not record participants' race, and 65 percent did not record their ethnicity.