Vaccinating against HIV
http://www.youtube.com/embed/QcdL8H9UMno

There is currently no vaccine to stop HIV transmission.

Watch Dr Iain Reeves explaining how vaccines work and why the high mutation rate of HIV has made it difficult to develop a vaccine. As you watch, try to make notes in your about the key reasons identified in the interview.

Follow these links then try to give three reasons why it is proving difficult to develop a vaccine against HIV.

http://www.guardian.co.uk/global-development/2010/sep/27/aids-health
http://www.iavi.org/why-a-vaccine/Pages/about-AIDS-vaccine.aspx