Viruses. Friends or enemies?

Viruses started inhabiting the Earth long before humans did. It is very possible that they will live here long after we are gone. Today people perceive viruses as enemies although some types of viruses live inside us all the time. Together with various bacteria and fungi viruses help form our internal microbiome. However people’s weariness is quite understandable. Throughout history of the mankind virus illnesses have been a cause of every major epidemic and pandemic. The viruses are indeed frightening. Their sheer nature makes them dangerous since they are evolving at an astonishing rate and are practically always changing.