This Fox News segment with Dr. Cathleen London discusses the question of vaccinating extremely young infants against some diseases. The practice of "cocooning", which is endorsed by the CDC, involves vaccinating all adults who will come into contact with the infant rather than exposing the child to potential risks of early vaccination.

The practice is supposedly effective, but some doctors have questioned its expense and impracticability in some cases. Watch the clip, embedded via Fox News, below: