Which of the following factors directly affects an individual’s susceptibility to infectious diseases?

• Air quality

• Immune status

• Geography

• Occupational setting

The term virulence refers to:

• The ability of the host to fight infection

• The severity or harmfulness of a pathogen

• The ability of an agent to remain stable in the environment

• The age of the host

Which of the following is considered an environmental factor influencing disease transmission?

• Nutritional status

• Pathogenicity

• Housing conditions

• Immunogenicity

Antigenic stability is important because:

• It determines how easily a pathogen infects a host

• It impacts the severity of symptoms

• It influences the portal of entry

• It affects the ability of the immune system to recognize the pathogen

A sufficiently large dose of an organism is necessary to produce infection. This is an example of a factor related to:

• Agent

• Host

• Environment

• Portal of entry

Infectivity refers to the ability of an agent to cause severe disease in a host.

• True

• False

Age, sex, and behavior are host factors that influence disease transmission.

• True

• False

Geography is an example of an agent factor that influences disease transmission.

• True

• False

Nutritional status of an individual can affect their susceptibility to infection.

• True

• False

Air quality is an environmental factor that can impact the spread of infectious diseases.

• True

• False