Two new studies in Africa have found out that HIV infection can be prevented by daily pills in heterosexual men and women.

The study results have come as a contradiction to the earlier research that showed that pills did not prevent infection in women in some African countries.

The Centers for Disease Control and Prevention ran a study done in Botswana. The University of Washington ran the second study in Kenya and Uganda. Both found that the pills reduced the risk of HIV infection by 63 percent or more, an AP report said.

The success in preventing HIV has led the University of Washington to stop the part of the study that gave placebos to some participants, for them to benefit from the protective pills. The drugs used are made by Gilead Sciences Inc. of California, said the report.