There is a general chain of events that applies to infections. The chain of events involves several steps—which include the infectious agent, reservoir, entering a susceptible host, exit and transmission to new hosts. Each of the links must be present in a chronological order for an infection to develop. Understanding these steps helps health care workers target the infection and prevent it from occurring in the first place.

শৰীৰৰ স্থান অনুসৰি
ৰোগ প্ৰক্ৰিয়া
বেক্টেৰিয়াজনিত বা ভাইৰাছজনিত
Biochemical tests