Li and colleagues use genetic information about human head and body lice to contest earlier ideas about the evolutionary history of people, lice, and the diseases that lice carry. What new claims do the authors make? Explain why they think that head lice are a harmless nuisance and that body lice are a health hazard.
Article- Genotyping of Human Lice Suggests Multiple Emergences of Body Lice from Local Head Louse Populations.