Latest news about a vaccine to prevent Alzheimer%u2019s disease will soon be on trial in six European countries. In unji try this there will be approximately 420 patients who participated. This trial will last until early 2012 to find out savor drug efficacy in order to be marketed. We know that prevention of Alzheimer%u2019s disease vaccine developed by a biotechnology company in Australia. New vaccine to prevent Alzheimer%u2019s disease is known by the name of the vaccine AD02.