Nightly News   |  May 06, 2013

Study: parents’ saliva stimulates baby’s immune system

A Swedish study published in the journal Pediatrics found children exposed to their parents’ saliva were less likely to develop allergies than those who weren’t. NBC’s Brian Williams reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>>> pass fir si fires were in the news saying if parents clean a fallen pacifier before giving it to the baby they are helping the infant's immune system and making them less susceptible to allergies in the process.