Today during a White House press briefing, Jeff Zients, White House COVID-19 coordinator, said 180 million Americans now have had at least one dose of a COVID-19 vaccine, and White House Chief Medical Advisor Anthony Fauci, MD, reassured the country that the three vaccines with emergency use authorization in the United States are likely effective against the Delta (B11617.2) variant."Going into the Fourth of July holiday weekend, Americans have good reason to celebrate," Zients said, explaining that 67% of adults have at least one shot, 3% short of President Joe Biden's goal of 70% of Americans ages 18 and up having at least one dose.Zients said that this weekend marks the first time Americans will be back together—not just with family or