Some authors have assumed that the "Back to Sleep" campaign has been telling
caregivers not to ever put infants in the prone position.

Hope this clarifies things,

"Since the initiation of the national campaign, some parents have
misinterpreted the recommendation to say that babies should never be placed
prone. This is incorrect.  Developmental experts advise that prone
positioning during the awake state is important for shoulder girdle motor
developement.  Therefore, parents should be advised that a certain amount of
'tummy time', when the baby is awake and observed, is good."

From "Back to Sleep, Questions and Answers for Professionals on Infant
Sleeping Position and SIDS", American Academy of Pediatrics.

This pamphlet and other related info can be obtained via calling the "Back to
Sleep" campaign line (US only) 1-800-505-CRIB

Pierrette Mimi Poinsett MD FAAP
Modesto CA