The immune system is a collection of billions of cells that travel through the bloodstream. They move in and out of tissues and organs, defending the body against foreign bodies (antigens), such as bacteria, viruses and cancerous cells.There are two types of lymphocytes :B cells-produce antibodies which are released into the fluid surrounding the bodyâs cells to destroy the invading viruses and bacteria. T cells (see picture opposite) - if the invader gets inside a cell, these (T cells) lock on to the infected cell, multiply and destroy it.here are two types of lymphocytes : B cells-produce antibodies which are released into the fluid surrounding the bodyâs cells to destroy the invading viruses and bacteria. T cells (see picture opposite) - if the invader gets inside a cell, these (T cells) lock on to the infected cell, multiply and destroy it.
Gillespieâs algorithm (Gillespie, 1977) is a way of im-. plementing consistently this probabilistic description of a biological system. The probabilistic. description by its very nature applies to single cells. The connection with molecular concentra-.
The OCTAVE method is an approach used to assess an organization's information security needs. OCTAVE Allegro is the most recently developed and actively supported method. This method is based on two older versions called OCTAVE Original and OCTAVE-S. OCTAVE methods are self-directed, flexible, and evolved. Using OCTAVE, small teams across business units and IT work together to address the security needs of the organization. The method can be tailored to the organization's unique risk environment, security and resilience objectives, and skill level.