When someone gets a bad infection, the body's immune system rushes in to fight the germs. But sometimes this defense system ...

The human body may seem like a single, self-contained system, but it actually hosts trillions of microscopic organisms. These ...

Shigella is a type of bacteria, genetically quite similar to E. coli. It causes an infection that messes with your digestive ...

Researchers have used a method of total-body imaging to measure and track the body’s immune response to viral infection. The method is a promising platform for studying human immunity in greater ...

A person from Iowa who recently returned to the United States from West Africa died Monday from a rare viral hemorrhagic fever that can be transmitted among humans through infected body fluids, state ...

Sexually transmitted diseases (STDs) typically affect the genitals, rectum and throat. These infections can involve the eyes as the result of direct contact or spread through the bloodstream. Although ...

A new clinical study suggests that successful root canal treatment may benefit more than just dental health. Patients treated for infected teeth showed improved blood sugar control, healthier ...