MSF programs around the world address a host of different medical issues and challenges. Many offer general inpatient and/or outpatient care. Depending on the location, staff may also provide maternal and pediatric care, mental health care, surgery, physiotherapy, vaccinations, and treatment for malnutrition and diseases such as HIV/AIDS, tuberculosis (and drugresistant tuberculosis), malaria, cholera, measles, and meningitis. MSF also responds to disease outbreaks and epidemics—in some cases offering water and sanitation services as well—and to instances of widespread movements of internally displaced people (i.e. people moving within the borders of their native land) and refugees (i.e. displaced people who cross a border into another country). Furthermore, MSF looks to provide care and advocate for patients suffering from neglected tropical diseases (NTDs) such as sleeping sickness, kala azar, and Chagas disease.