But Clifford May says it is an important point to make to the Afghans and the entire region that the U.S.is not going to stay there forever.

VOA: standard.2009.12.06

Exactly how the differences in bacteria might make vaginally born babies less prone to allergies and asthma isn't yet clear, but it does point to a difference that researchers can look at going forward.

VOA: standard.2010.06.30