States, business sort out what new CDC mask guidance means

A customer exits a corner market while wearing a protective mask Friday in the retail shopping district of the SoHo neighborhood of the Manhattan borough of New York, Friday. (AP Photo/John Minchillo)

Although no longer required outside, a sign advises visitors Thursday to wear masks at the Denver Zoo in Denver. (AP Photo/David Zalubowski, File)

More than a dozen states quickly embraced new federal guidelines that say fully vaccinated Americans no longer need to wear masks indoors or out in most cases. But other states and cities and some major businesses hesitated amid doubts about whether the approach is safe or even workable.