There are all sorts of ways to get an infectious disease—from people and animals, to eating contaminated foods, to environmental exposure.
HIV is a retrovirus that impairs the immune system and causes AIDS. Learn about symptoms and treatment.
Vaccines aren’t just for kids. Thousands of adults go to the hospital each year for a serious (sometimes even deadly) disease they might have avoided if they had received the vaccination to prevent it.
Alzheimer's disease is a type of dementia, causing confusion and memory loss severe enough to interfere with everyday life.
Sexually transmitted infections are caused by bacteria, viruses, and parasites that can spread through sexual contact.
Diabetes is a condition in which the body either does not produce insulin or does not use it properly. Learn about symptoms and treatment.
Type 2 diabetes is a chronic disease in which the body is unable to properly make use of insulin, leading to high blood glucose levels.
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.
Type 1 diabetes is a chronic disease in which the body makes little to no insulin, resulting in high blood glucose levels.
Measles is a contagious virus commonly seen in children that causes fever, cough, runny nose, and pneumonia. Learn about symptoms and treatment.