HIV is a deadly virus which hides to survive. Like a spy on the run it blends in – mixing its genome with that of its enemy: our immune defences. Lying undetected inside infected lymphocytes [white blood cells], the virus replicates, its threat slowly growing as it prepares to undermine our defences from within. With a foe as crafty as HIV, future vaccinations must be swift and uncompromising – the immune system must receive the right orders quickly, or perish. Pictured is a computer simulation of the latest weapon against viral espionage: a man-made virus-like particle that presents our immune system with detailed ‘intelligence’ about an enemy virus. Measuring 450,000 times smaller than a passport photo, this blue-coloured particle safely houses tiny pieces of HIV’s chemical structure (shown in yellow and red), allowing immune cells to plan their attack in advance before they face the enemy.
Written by John Ankers
BPoD stands for Biomedical Picture of the Day. Managed by the MRC London Institute of Medical Sciences the website aims to engage everyone, young and old, in the wonders of biomedicine. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.
BPoD is also available in Catalan at www.bpod.cat with translations by the University of Valencia.