* HIV rate up to 12.2 pct in 2012 vs 10.6 pct in 2008
* Young black women worst effected by HIV spread
* Treatment more widespread but education on virus poor
JOHANNESBURG, April 2 (Reuters) - The prevalence of HIV/AIDS in South Africa is rising due to the world's fastest growth in new infections and a higher patient survival rate, according to a new health study.
An estimated 12.2 ...