There are all sorts of ways to get an infectious disease—from people and animals, to eating contaminated foods, to environmental exposure.
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.
HIV is a retrovirus that impairs the immune system and causes AIDS. Learn about symptoms and treatment.
Hepatitis B and C are viral infections that primarily affect the liver. Learn about symptoms and treatment.
Autism is a neurodevelopmental disorder that interferes with the ability to learn, communicate, and interact. Learn about symptoms and treatment.
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.
Diseases that are transmitted to humans through the bite of ticks infected with several types of bacteria and viruses.
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.