Practitioners can come from several different educational streams. Many begin as nurses, some as medical technologists (particularly in clinical microbiology), and some as physicians (typically infectious disease specialists). Specialized training in infection control and health care epidemiology are offered by the professional organizations described below. Physicians who desire to become infection control practitioners often are trained in the context of an infectious disease fellowship. Training that is conducted "face to face", via a computer, or via video conferencing may help improve compliance and reduce errors when compared with "folder based" training (providing health care professionals with written information or instructions).