More than 25 million people have lost their lives to the AIDS virus between 1981 and 2007. An estimated 33.3 million people worldwide currently live with HIV. World AIDS Day, started by the World Health Organization, is a worldwide event that focuses on supporting those who are living with HIV, remembering those who have lost their lives, learning facts about HIV and putting that knowledge to use to educate others and fight this devastating virus.The Cincinnati Regional Advisory Group presents the 2011 World AIDS Day Extravaganza 7-10 p.m. Thursday at Below Zero Lounge. Admittance is free for attendees. Included in the evening’s events are food, live musical performances, a raffle and more. This year’s theme is “Getting to Zero,” which stands for zero AIDS related deaths, zero discrimination and zero new infections.