Abstract
Infectious diseases are caused by various pathogens, and it would spread between people and people ,animals and animals, or people and animals.They are always happended and spreaded. Since human beings there, they began to continue the fight against the disease. Infectious diseases seriously endanger human life, health, and brought a great human disaster.In this paper, uses a ordinary differential equation model of infectious disease with direct vatio infection to the species of unmotive force and we do some numerical simulation about the ordinary differential equation model of infectious disease with direct vatio infection by the mathematic software MATLAB.and we find its spread principle in different situation.Then taking advantage of the qualities of phase trajectory,discusses the characteristics concerned the solution of the ordinary differential equation model of infectious disease with direct vatio infection. And some efficient ways to control the spreading of the infectious diseases.
Key words:Numerical simulation;Direct vatio infection;To the species of unmotive;
Phase trajectory