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The respiratory system is a group of organs and tissues that help humans breathe. The main parts of the respiratory system are the airways, the lungs and linked blood vessels, and the muscles that enable breathing. This course provides an overview of the human respiratory system.

Coronavirus (COVID-19) is a novel virus that causes respiratory disease in persons infected, which can range from mild symptoms such as a common cold to more severe diseases – even death. This course provides health care workers with both individual and workplace practices to help prevent the spread of transmission and ultimately keep patients, team members and the public safe.

This course provides an overview of the human digestive system, including a discussion of the major diseases that can affect it.

This course examines the biology of influenza and types of vaccinations. It also discusses signs and symptoms, lab diagnoses and measures to control infection. Also provided in this course are a brief history of influenza pandemics, the avian flu (H5N1) and current research being conducted.