The Food and Drug Administration (FDA) today issued an emergency use authorization (EUA) for the Johnson & Johnson COVID-19 vaccine, giving the United States a third vaccine to fight the pandemic—one that offers an easier, one-dose option.The formal announcement follows yesterday's unanimous recommendation from the FDA's outside advisory panel, the Vaccines and Related Biological Products Advisory Committee (VRBPAC).In a statement, acting FDA Commissioner Janet Woodcock, MD, said vaccines are the best prevention in the fight against COVID-19.And Peter Marks, MD, PhD, who directs the FDA's Center for Biologics and Research, said, "With today’s authorization, we are adding another vaccine in our medical toolbox to fight this virus.