 Here we have explored underlying structures of different biological networks which support faster spreading  and are better in communication between nodes in them. In this regard, we have analyzed the good expansion property , from large spectral gap , and communicability between nodes in those networks . Different epidemic models are also used to study the same.
<coherence>  Here we have explored underlying structures of different biological networks which support faster spreading  and are better in communication between nodes in them. In this regard, we have analyzed the good expansion property , from large spectral gap , and communicability between nodes in those networks . Different epidemic models are also used to study the same.
 Here we have explored underlying structures of different biological networks which support faster spreading and are better in communication . We analyze the good expansion property , from large spectral gap , and communicability between nodes in those networks . Different epidemic models are also used to study the same.