London Feb 2: Compared to other mammals the proportion of humans infected with retroviruses is less and we have fewer remnants of viral DNA in our genes a new research has found. This could be because of reduced exposure to blood-borne viruses as humans evolved to use tools rather than biting during violent conflict and the hunting of animals the researchers noted. One reason for the reduction in retroviral incorporation into the human genome might be a change in behaviour as humans evolved the study noted. Fewer bloody fights and less exposure to infected meat meant that compared to other
