An infectious disease is a medical term regarding a disease that has a high rate of infection. In other words pathogenic microbial agents like viruses, bacteria, fungi, and parasites are all considered an infectious disease. This is because the disease will spread from one person to the next. An infectious disease can also be called a contagious disease. The most troublesome infectious disease in the past was the bubonic plague. However, today there are a number of different diseases like anthrax that can be just as deadly.
Sometimes an infectious disease is something more common. For example warts or a respiratory infection is an infectious disease, but the outcome is benign. There is nothing life threatening in these common issues. There are a number of methods to treat the diseases, and the doctors will choose the best path.