An infectious disease is an illness that is caused by organisms such as bacteria, viruses, fungi, and parasites. Many of these organisms live in or on our bodies, and are normally harmless. But under certain circumstances, they can cause disease.
Course Learning Objectives:
- Describe infectious disease, and the ways in which germs that can cause infectious disease are spread.
- Identify common symptoms of infectious diseases, and why young children are vulnerable to infectious diseases.