Credit Blake Farmer / WPLN Some COVID-19 vaccines are already in use, but the clinical trials roll on. In fact, they’re still recruiting participants, and they’re particularly focused on signing up people of color. At first, speed was the top priority. Now diversity is, says Dr. Stephan Sharp, who leads a vaccine trial site at Clinical Research Associates in Nashville. He recently held a Facebook event with Kurdish young professionals. “We want folks from all different ethnic backgrounds. because it’s possible that the vaccine works better in one group or lesser in another group, and the only way to find out is to test it,” he said.