Head lice are small, wingless insects that live in human hair. Their scientific name is Pediculus humanus capitis, and they have been a human pest for thousands of years. Their full life cycle, from ...

Malaria is a parasitic disease of human beings. It is transmitted in 108 countries, in total affecting around 3 billion people. In 2010, it caused an estimated 216 million cases and 655,000 deaths.