HIV is a retrovirus that impairs the immune system and causes AIDS. Learn about symptoms and treatment.
There are all sorts of ways to get an infectious disease—from people and animals, to eating contaminated foods, to environmental exposure.
Sexually transmitted infections are caused by bacteria, viruses, and parasites that can spread through sexual contact.
Parasitic diseases are infections caused by organisms that are often microscopic. Learn about symptoms and treatment.
Global health and travel-related maladies are a group of diseases that can pose a serious threat to people who have traveled to certain countries. Learn about symptoms and treatment.
A serious and potentially fatal disease caused by parasites that enter the body via mosquito bites. People with malaria typically experience fever, chills, headache, nausea, and fatigue.
Everyone feels anxiety at times, but a person whose anxiety interferes with living a normal life may have an anxiety disorder, and it can be treated.
Meningitis is inflammation of the brain and spinal cord membranes, usually caused by an infection. Learn about symptoms and treatment.
Herpes is a sexually transmitted infection that can cause genital pain and sores. Learn about symptoms and treatment.
A disease caused by infection with the monkeypox virus that causes rash and flu-like symptoms.