Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Moderna Enrolls 30,000 Diverse Americans in Phase 3 Trials Keminni Amanor Moderna Therapeutics, one of many companies conducting COVID-19 vaccine trials, said Thursday that it hadcompleted the enrollment of about 30,000 participants for a third phase. The biotechnology firm saidthe participants included more than 11,000 who are people of color. The figure includes more than 6,000 Hispanic participants and 3,000 African Americans. Moderna said these two groups represented 37% of the study population, which reflects the diversity of the U.S. at large. .