moderna vaccine April 8, 2021 11:04 am US Reaches Pandemic Milestone With 1 in 4 Adults Fully Vaccinated The United States reached a milestone in its efforts to combat the coronavirus, with one in four American adults now fully vaccinated. US & World Videos 1:43 How to tell if it's COVID, flu or fall allergies and what to do 1:59 New COVID-19 vaccines, free tests available as cases rise 1:31 CDC recommends updated Covid shot for everyone ages 6 months and up 1:33 People weigh updated COVID-19 boosters as FDA potential approval nears 2:26 COVID-19 Public Health Emergency Ends in Connecticut