Millions of Americans Decline Second Dose of Experimental mRNA COVID-19 Vaccines
By the end of April 2021, more than five million people in the United States, or about eight percent of the population, had not received the second dose of the experimental mRNA Pfizer/BioNTech or Moderna/NIAID COVID-19 vaccines being distributed under an Emergency Use Authorization (EUA) granted by the U.S. Food and Drug Administration (FDA).
