Epi review

Incidence is the .....

• The ability of an agent to cause infection in a susceptible host

• Number of existing cases of a disease

• Severity of disease after infection occurs

• Sufficient proportion of a population is immune to an infectious disease (through vaccination and/or prior illness) to make its spread from person to person unlikely

• Number of new cases of a disease

Infectivity is the .....

• The ability of an agent to cause infection in a susceptible host

• Number of existing cases of a disease

• Severity of disease after infection occurs

• Sufficient proportion of a population is immune to an infectious disease (through vaccination and/or prior illness) to make its spread from person to person unlikely

• Number of new cases of a disease

Community (herd) immunity is when a .....

• The ability of an agent to cause infection in a susceptible host

• Number of existing cases of a disease

• Severity of disease after infection occurs

• Sufficient proportion of a population is immune to an infectious disease (through vaccination and/or prior illness) to make its spread from person to person unlikely

• Number of new cases of a disease

Prevalence is .....

• The ability of an agent to cause infection in a susceptible host

• Number of existing cases of a disease

• Severity of disease after infection occurs

• Sufficient proportion of a population is immune to an infectious disease (through vaccination and/or prior illness) to make its spread from person to person unlikely

• Number of new cases of a disease

You watch a group of the 5,000 people in your town. During a five-year period, 25 individuals are newly diagnosed with diabetes mellitus. What is the annual incidence of diabetes mellitus for your town?

• 1

• • 1 case / 1000 people-year

• • .001 case / 1000 people-year

• Unable to calculate, not enough information