Most people think of missionaries and also think religion, not health care; missionaries tend to the soul, not the body. But when a group of Pennsylvania missionaries from a small German Protestant church traveled to Tanzania, what they found left them emotionally shaken but nonetheless determined. Led by husband-and-wife doctors, who had pioneered AIDS programs in this rural area of western Tanzania, they found a crippling AIDS epidemic and a legion of orphans left in its wake. They quickly realized they had to confront AIDS as their battle. The future of the Moravian Church, which now counts a majority of its membership in Tanzania, would depend on it.