http://www.newsweek.com/id/180968
Yikes.
Quote:
| Scientists don't understand exactly why, but they suspect that the typical child harbors so many intestinal bugs that the immune system is overwhelmed and fails to pick up on the vaccine. In relatively sanitary Europe or the United States, a child typically requires three doses of an oral vaccine to gain immunity; kids in northern India need as many as 12 doses. |







