Relaxation of Gene Network after Injection of Influenza Virus

The relaxation of gene network after injection of influenza virus is investigated from the perspective of diffusion process. The key idea is to separate each snapshot network into communities, and the identification number of the community in which every node occurs is used to represent the state of the node in this snapshot. From a series of snapshots of network one can construct the trajectories for all the nodes, which form an ensemble. The relaxation is then described by the division and fusion of the communities. It is found that the gene networks for healthy individuals evolves regularly, while that for the individuals affected by influenza virus in a chaotic way.