CDC Chief: Delta variant now to blame for 83 percent of New COVID Cases

<p>CDC Chief: Delta variant now to blame for 83 percent of new COVID cases, "A dramatic increase" Since early July; Poll: majority of unvaccinated Americans say they're unlikely to get a COVID-19 shot, regardless of outreach efforts; At least 9 States block mask requirements in schools as pediatric group urges all students to mask up; Fauci: Schools may need to mandate vaccines for kids; </p><p>To learn more about how CNN protects listener privacy, visit cnn.com/privacy</p>