AIDS What is it and what does it do

AIDS HIV PANDEMIC AIDS and Children HIV AIDS Germs Three lines of defense Chemical and Physical Barriers Weaknesses Self vs. non-self Non-specific response Macrophages Inflammatory response Inflammatory response Inflammatory response Inflammatory response Immune System Immune system Recognizing pathogens B-cells vs. T-cells Immune System in Action Scenario: exposure to new flu virus Recognizing a new pathogen T-cells B-cells T-cells and B-cells Immune System in Action Memory Cells Naïve T-cell Clones Of original cell Active T-cell Memory Cell Same flu virus: round two Vaccination HIV and Immune System HIV kills helper T-cells Helper T-cells and infections HIV vaccines? HIV vaccine – other problems Current treatment Problems? When you can’t fight it, trick it When you can’t fight it, trick it When you can’t fight it, trick it Virus Traps So far…… Viruses and bacteria Viruses and bacteria