Quiz: Overview of Infectious Disease
Question 1 of 2  

Microorganisms are tiny living creatures, such as bacteria and viruses. Microorganisms are present everywhere. Despite their overwhelming abundance, relatively few of the thousands of species of microorganisms cause disease in people. Whether a microorganism lives as a harmless companion in a person's body or invades and causes disease depends on which of the following?

  • A.

    The season of the year

  • B.

    The amount of sunlight a person gets

  • C.

    The person's natural defenses

  • D.

    The person's use of supplements 

Am I correct?