NEW DELHI (AP) — The Indian government announced Tuesday the development of a new low-cost vaccine proven effective against a diarrhea-causing virus that is one of the leading causes of childhood deaths across the developing world.

The Indian manufacturer of the new rotavirus vaccine pledged to sell it for $1 a dose, a significant discount from the cost of the current vaccines on the market. That reduced price would make it far easier for poor countries to vaccinate their children against the deadly virus, health experts said.