CDC changes, then retracts, web posting on how virus spreads

In this Sept. 16 photo, Centers for Disease Control and Prevention Director Dr. Robert Redfield puts his mask back on after speaking at a hearing on Capitol Hill, in Washington. (AP Photo/Andrew Harnik, Pool, File)

NEW YORK — The top U.S. public health agency stirred confusion by posting — and then taking down — an apparent change in its position on how easily the coronavirus can spread from person to person through the air.