With life starting to get back to normal in some cities across the United States, the Delta variant of COVID-19 could become the dominant strain in the country. In this week’s Sunday Focus, NBC News’ senior medical correspondent Dr. John Torres reports that the key to stopping COVID-19 and all its variants is to get vaccinated. Some 65% of Americans have received at least one shot. » Subscribe to TODAY: http://on.today.com/SubscribeToTODAY » Watch the latest from TODAY: http://bit.ly/LatestTODAY About: TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: http://on.today.com/ReadTODAY Find TODAY on Facebook: http://on.today.com/LikeTODAY Follow TODAY on Twitter: http://on.today.com/FollowTODAY Follow TODAY on Instagram: http://on.today.com/InstaTODAY #Coronavirus #SundayTODAY