For 10 points, name this virus that causes AIDS.
The envelope of this virus contains gp120. This virus can use CCR5 or CXCR4 for entry into cells. One drug important to fighting this virus is AZT, which is a protease inhibitor. Infection with this virus can lead to opportunistic Kaposi's sarcoma. This virus infects cells with CD4, namely helper T cells. It can take 10 years for this virus to cause the disorder that it is associated with. For 10 points, name this virus that causes AIDS.
The envelope of this virus contains gp120. This virus can use CCR5 or CXCR4 for entry into cells.
HIV