Chapter

What causes infectious diseases?

From HE A LTH EDUC A TION H E A L T H 1 0 0 V E R S I O N 3 by Sambif

Concepts

  1. Pathogens

    "Infectious diseases are transmitted between individuals by infectious agents, known as pathogens [path-oh-jens], from the Greek words pathos (to suffer) and genès (to produce). Pathogens produce a lo

  2. Risk Factors

    "Human biology is another factor to consider in explaining the cause of infectious diseases. Infancy and old age, inadequate nourishment, other illnesses and some types of medication can all create co

  3. Direct Transmission

    "A new infection begins when pathogens leave the body of their host—the infected individual in which the pathogens are multiplying—and enter a new host. They may be repelled by defense mechanisms, suc

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