CDC Facing Questions Over Mask Guidance As Breakthrough Cases Rise

The CDC says its guidance on mask wearing has not changed, but experts are raising questions about masks as breakthrough cases rise.

 "The Delta virus is much more infectious. Its viral load is thousands of times higher than our previous variants. It's going to make even the average healthy person sick now," said Dr. Catherine O'Neal of Our Lady of the Lake Regional Medical Center in Baton Rouge, Louisiana.  Just three states now account for 40% of new COVID cases, but cases are rising elsewhere too.   "We do know that in our ICUs, we are seeing younger people intubated who are very sick or who are on the floors and are very sick. That should be a gigantic wake-up call," said Jeanne Marrazzo, director of the Division of Infectious Diseases, at the University of Alabama at Birmingham