Before revision:  We found that (a ) the awareness of the disease plays the central role in preventing disease outbreak ;
After revision:  We use both a mean-field approximation and Monte Carlo simulations to analyze the dynamics of the model. Information diffusion influences behavior change by allowing people to be aware of the disease and adopt self-protection, and subsequently affects disease transmission by changing the actual infection rate. Results show that (a) awareness plays a central role in preventing disease outbreak ;