Researchers with the University of Virginia School of Medicine followed children in Bangladesh to figure out why vaccinations for polio and the rotavirus often fail in developing countries.
They discovered that malnutrition, diarrhea, and shortened breastfeeding were associated with a bad response to vaccines.
“There's three different polio viruses and in fact two have already been eliminated so we're down to the very last polio virus, and it’s only three countries that are left that have polio,” said UVA Dr. William Petri. “So it's a wonderful time where I think in the next few years we'll see there will never be a child that's going to be paralyzed from polio again."
Researchers plan to share their findings with the World Health Organization and the Centers for Disease Control and Prevention.