Emergency medicine is a subspecialty that focuses on patients who need immediate and often intensive care. These physicians must be able to handle medical problems quickly to avoid potential complications with their patients. With their knowledge of emergency medicine comes knowledge about many other types of medicine, as they must be able to respond to patients who present a variety of symptoms and problems. They will also have a thorough understanding of emergency medical devices.

An infectious disease specialist is a medical professional who has been trained to prevent, diagnose, and treat infectious diseases. They see patients who are exhibiting signs or symptoms of an infectious disease and perform a variety of tests to determine the type of disease and prevent it from spreading.

A Physical Medicine & Rehabilitation Specialist is a healthcare professional who uses mechanical movements, manual movements, and exercise to help treat patients. They use various treatment methods to help their patients deal with pain and even learn to walk or move certain muscles or parts of the body again. They work closely with another medical professional to diagnose and treat patients properly.