Did you know: HIV Vaccine "STEP" faliure

According to the Imperial London College the HIV vaccine trail know as "STEP" was halted in September of 2007 due to adverse affects. Dormant forms of HIV genes where inserted into a adenovirus shell, which we know as the common cold, in hopes that if the patient was to come into contact with the virus are body would be able to recognize the virus and fight it off. I understand that the idea was there, but the adenovirus shell did what it does best to fight off a cold. You see, when you become sick with a common cold your body increases your CD4 T-cell count especially where the virus is most likely to enter, the mucous membranes(i.e vagina, mouth, nose, and gut). Unfortunately, HIV targets CD4-T cells and uses the cells to replicate, so the vaccine just gave the patients more cells for HIV/AIDS to affect and in the most vulnerable areas too. So inadvertently, the patients taking the STEP vaccine where more likely to get infected with HIV/AIDS. I do not understand how the scientists looked past this, and honestly it seems like a pretty dumb mistake on my behalf, but we only learn by making mistakes.

Imperial College London(2009, November 19). HIV vaccine failure probably caused by virus used, says new research. ScienceDaily. www.sciencedaily.com/releases/2009/11/091116165635.htm