Micro-organisms are 'invisible' to the immune system
Friday, August 19, 2011 - 09:30
in Health & Medicine
That micro-organisms have a great capacity to vary their surface structure is well known. It is one of the reasons why it is so difficult to develop vaccines against HIV and malaria, and why new influenza vaccines have to be produced every year. But it seems that these micro-organisms are also able to completely avoid activating a strong immune response in the person attacked.