The main function of the immune system is to protect against diseases and infections. For unknown reasons our immune system attacks healthy cells, tissues and organs in a process called autoimmunity, which can result in diseases ...
Oct 07, 2014
4.9 / 5 (20) | 0
Influenza viruses mutate annually, making it difficult to produce vaccines that induce antibodies capable of recognizing the changing proteins on the surface of the flu virus and conferring long-term immunity.
Oct 10, 2014
4.3 / 5 (3) | 0