A study on symbiosis between humanity and infectious diseases

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This study focuses on adaptation process of virus as a pathogen and humanity as a host. The opportunity for a new virus to emerge into a human society, recently, increases because of the growth of global population, urbanization, the loss of rain forest and destruction of ecosystem resulted by them. However, from ecological view point, the virus infections have appeared and disappeared as a human society changes over time. We examined such a situation by using epidemiological simulation. As a result, we could obtain a hypothesis that humanity should co-live with viruses, timing them as to be a low virulent one. But in the other hand, we realized that there seems a challenge ahead for us human to address this issue.