Yesterday was World AIDS Day, and while much progress has been made in the past decade, many say that there is still significantly more to be done in the fight against the deadly affliction.

The White House marked the day by placing giant red ribbons on the grounds. In places such as Zimbabwe, native celebrities made appearances to encourage residents to get tested for HIV and AIDS, and to dispel fears of those who suffer from them.

The United Nations says that new HIV infections have declined by nearly 20 percent globally over the past decade, but that the number of new HIV infections is higher than the number of people beginning treatment.

The estimated number of children living with HIV or AIDS between 2001 and 2009 increased by 46 percent.