With the Delta variant rapidly spreading, Dr. Anthony Fauci is warning there could soon be "two Americas" - one where people are vaccinated and another where low vaccination rates could lead to skyrocketing cases. The disparity between low and high vaccination areas is something Fauci is "very concerned about,"he told CNN on Tuesday night. If you are not vaccinated, you are at considerable risk." Fauci's comments come as the Delta variant, which health experts say is more contagious and aggressive, has reached nearly every state in the U.S. and now accounts for 26% of COVID-19 cases as of Tuesday, according to the CDC.