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In Moderna’s study, 9.7% of trial participants were African American, 20% of them Hispanic/Latino, 4.7% of them Asian, and 5.2%, and < 3% from other racial groups. 36.5% communities of color. In Pfizer’s study, 9.8% of trial participants were African American, 26.2% of them Hispanic, 4.4% of them Asian, and < 3% from other racial groups. Find further vaccine trial demographics in the FDA reports for Moderna and Pfizer.

Over 250,000 people participated in vaccine trials worldwide with American Phase 3 trials.

Worldwide trial counts:  Bloomberg COVID Tracker

The CDC Vaccines Page updates this count daily.  Dr. Fauci said that President Biden’s pledge of 100 million doses by the end of April was achievable and that the US “can and should” vaccinate 70-85% of adults by the end of summer.

Several sources provide good summaries of COVID vaccine rates, nationally and by locality and group: Bloomberg COVID Tracker & CDC Vaccines Page are two of the best.

Because of institutionalized racism’s impact on healthcare access and other general socioeconomic constraints, Black, Hispanic, Asian, Native American and other racial and ethnic minorities have been consistently underrepresented in clinical trials. The COVID pandemic has impacted these groups disproportionately and raised awareness—and created a sense of urgency—about the need to include them in clinical trials. This context made vaccine developers focus on recruiting representative population samples for their studies in order to make sure the vaccine would work for everyone. Both Pfizer and Moderna achieved sample populations that reflected the adult United States’ population demographics. Over a third of vaccine participants were People of Color; 10% of them Black and 20% of them Hispanic. 

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