Before revision:  We found that SI model has scale-free property for degree distribution P(k)\sim k^{\eta} with surprisingly small critical exponent -2<\eta< -1. Running the standard SIR model on clustered SI- and FC-networks, we demonstrate that the adaptive network clustering caused by self-isolation in communities prohibits the epidemic spread better than the clustering due to instant boundaries closing .
After revision:  We found that SI model has scale-free property for degree distribution P(k)\sim k^{\eta} with surprisingly small critical exponent -2<\eta< -1 and argue that scale-free behavior emerges due to the randomness in the adaptive network clustering caused by self-isolation in communities prohibits the epidemic spread better than the clustering due to instant boundaries closing .