Twin 9-year-old girls at Duke Health became the first in the United States to participate in Pfizer and BioNTech Phase 1 study to evaluate safety, tolerability and immunogenicity of the Pfizer-BioNTech COVID-19 vaccine in preventing COVID-19 among healthy children below the age of 12.
The participants -- Alejandra and Marisol Gerardo -- received their first vaccinations on Wednesday, March 24.