Three types of parasites can cause disease in humans. They are protozoa, carried by mosquitos, helminths, such as roundworm, and ectoparasites, for instance lice and bed bugs. Parasites are organisms ...

A debilitating infection from the parasitic Guinea worm is inching closer to global eradication, with an all-time low of only 10 human cases reported worldwide in 2025, the Carter Center announced. If ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Ready to read ...

The woman’s mysterious symptoms started in her stomach. Weeks of abdominal pain and diarrhea led to night sweats and a dry cough. Then, doctors found lesions on her lungs, liver and spleen. An ...

Brain parasite cysts contain multiple active forms, not dormant cells, explaining treatment resistance and reactivation patterns.