A parasite that lives in our brains for life—that sounds worrying. Yet the vast majority of people would not even know they are infected, as it rarely poses clinical problems in healthy people who ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. As health officials investigate a surge in cyclosporiasis cases across ...

Around one in three people worldwide have been infected with a microscopic parasite called Toxoplasma gondii – or simply “toxo” – which can cause toxoplasmosis. After the initial infection, toxo ...