What are the characteristics of infectious diseases?

Infectious diseases have many characteristics. The main feature of infectious diseases is the ability to quickly spread and infect a large number of people. All due to the fact that infectious diseases are transmitted through contact with a sick person. There is also an incubation period when we do not feel that we are infected. The pathogen can be “conserved”, that is, it will remain in various places, for example, in burial grounds, and wait until an animal or a person comes into contact with the site of infection.