A study conducted by the Centre for the Aids Programme of Research at the University of KwaZulu-Natal has found that sexually active women at risk of contracting HIV were 54% less likely to become infected if they used a microbicide gel containing 1% of the antiretroviral tenofovir. The 54% success rate was derived after the women in the study had used microbicides for a year, and this dropped to 39% after two-and-a-half years. Further studies with a larger sample group (the current study recruited 889 women) are yet to be carried out. Read more: The Guadian via the M&G
All tortoises are actually turtles. Some turtles however are not tortoises.