Scientists find the invisibility cloak that shields HIV-1 from the immune system

The image depicts an HIV-2 virus getting in contact with a dendritic cell . When the virus enters the dendritic cell, the capsid shell containing a viral RNA... Of the two major types of HIV, only one, HIV-1, typically causes AIDS in infected people who don't receive treatment.

http://www.eurekalert.org/pub_releases/2013-11/cp-sft111413.php