CDC Chief Warns "Virus Has No Incentive To Let UP"

CDC Chief warns "Virus has no incentive to let up"; Biden does not rule out a change in mask wearing guidance as he stresses pandemic is among the unvaccinated; Mask debate returns as "Aggressive" Delta variant derails progress; Health officials: United States seeing consequences despite warnings: "It's serious and it's spreading faster than was anticipated"; To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices