Clinical trials are underway to test a new treatment for pregnant women, which could tackle some of the leading preventable causes of death for babies in sub-Saharan Africa, researchers at the London School of Hygiene & Tropical Medicine (LSHTM) said. A large number of pregnant women in sub-Saharan Africa are infected with both malaria and sexually transmitted - reproductive tract infections (STIs - RTIs), according to a new study published in the Journal of the American Medical Association.