SAN DIEGO -- Portions of the AIDS Memorial Quilt were displayed Monday at the University of California, San Diego to commemorate the 20th anniversary of World AIDS Day.

On exhibit were three sections of the quilt that were created by San Diego organizations and individuals from early on in the emergence of the pandemic through the present day.

In recognition of World Aids Day, UCSD also sponsored a two-hour candlelight vigil and displayed a large red ribbon above the Price Center Plaza. Physicians who treated HIV/AIDS patients in Africa spoke on campus, and students signed a "Wall of Remembrance."

According to the World Health Organization, an estimated 33.2 million people worldwide were living with HIV in 2007, two thirds of them in sub-Saharan Africa. That same year, about 2.5 million people became newly infected, and 2.1 million died of AIDS, including 330,000 children.