The Centers for Disease Control and Preventions says COVID-19 cases, hospitalizations and deaths continue to drop in the United States, with this week's seven-day average of cases registering at less that 13,300, the first time it has dropped below 15,000 since late March, 2020. CDC Director Dr. Rochelle Walensky says the seven-day average of new hospitalizations is just over 2200 per day, and yesterday, the U.S. registered 379 deaths due to COVID-19. "Each week, there are more and more data to demonstrate the impact of vaccination has on preventing disease and moving us out of this pandemic," Walensky said Tuesday. The CDC director said more than 85 percent of Americans over 65 have received at least one dose of the COVID-19 vaccine, and 75 percent of that age group have received both doses. "Still, we have a lot more work to do, especially in younger age groups," she said. Dr. Anthony Fauci told reporters the COVID-19 Delta variant, first identified in India, has become the dominant strain in the United Kingdom, amounting to approximately 60 percent of new cases there. Fauci said the Delta variant has been reported in some 60 countries, including the United States. He told reporters it may be associated with increased disease severity compared to the Alpha variant. He said although a single dose of the vaccine has shown less effectiveness against the Delta variant, two doses of the Pfizer and AstraZeneca vaccines have shown greater effectiveness against it. Fauci said boosting the U.S. vaccination rate will help guard against the Delta variant gaining a greater hold here. "We cannot let that happen in the United States," he said. "Make sure you get that second dose. And for those who have been not vaccinated yet, please get vaccinated." Finally, Dr. Marcella Nunez-Smith, a senior adviser to the COVID response team said the U.S. Department of Transportation announced that 350 transit systems across the U.S. are offering free rides to vaccination sites. "We want to give everyone in the country as many free transit options as possible by subway, bus, ride share," she said. "There are multiple ways to get to and from your shot for free." Subscribe to our YouTube channel: https://bit.ly/2TwO8Gm Bloomberg Quicktake brings you live global news and original shows spanning business, technology, politics and culture. Make sense of the stories changing your business and your world. To watch complete coverage on Bloomberg Quicktake 24/7, visit http://www.bloomberg.com/qt/live, or watch on Apple TV, Roku, Samsung Smart TV, Fire TV and Android TV on the Bloomberg app. Have a story to tell? Fill out this survey for a chance to have it featured on Bloomberg Quicktake: https://cor.us/surveys/27AF30 Connect with us on… YouTube: https://www.youtube.com/user/Bloomberg Breaking News on YouTube: https://www.youtube.com/c/BloombergQuickTakeNews Twitter: https://twitter.com/quicktake Facebook: https://www.facebook.com/quicktake Instagram: https://www.instagram.com/quicktake