Epidemics, Endemics, & Pandemics
Case Concepts in Epidemiology
Disease Transmission Concepts
Modes of Disease Transmission
Levels of Prevention
100

When the occurrence of a disease or illness exceeds the normal amount in a region.

What is an epidemic?

100

An individual who has been diagnosed with a particular disease or condition. 

What is a case?

100

The place where a pathogen can live or grow.

What is a reservoir?

100

The transfer of infectious diseases from one person to another through physical contact.

What is direct transmission?

100

The prevention of diseases before it occurs.

What is primary prevention?

200

An epidemic that has become more widespread as it attacks a larger region or continent and affects a large number of individuals.

What is a pandemic?

200

The first disease case in a population.

What is a primary case?

200

An organism that can transmit disease from one host to another.

What is a vector?

200

The transfer of an infectious disease through an intermediate item such as water, food, or air currents.

What is an indirect transmission?

200

A behavior change in the individual that can help prevent a disease from occurring.

What is active primary prevention?

300

When a disease has an ongoing presence or is native to a specific region or group of people.

What is an endemic?

300

The first case that is brought to the epidemiologist's attention.

What is an index case?

300

An object that can carry an infectious agent and is capable of transmitting it.

What is a fomite?

300

The transmission of infectious diseases through dust particles or droplets that can carry the disease to the host.

What is airborne transmission?

300

Prevention strategy that does not require a behavior change from the individual.

What is passive primary prevention?

400

An epidemic that comes from a specific source.

What is a common-source epidemic?

400

The severity of an illness.

What is case severity?

400

Animals are able to transmit disease to humans.

What is zoonosis?

400

The transmission of disease to a human by a vector.

What is vector-borne transmission?

400

Health screenings and early detection are used to identify the disease and help prevent the illness from progressing.

What is secondary prevention?

500

An epidemic where the disease spreads from one infected person to another. 

What is a propagated epidemic?

500

An individual who has not yet been diagnosed, but possesses all the signs and symptoms of the disease. 

What is a suspect case?

500

An individual who carries a pathogen and is still infectious even in the recovery phase. 

What is a convalescent carrier?

500

The transmission of an infectious disease through an inanimate object such as drinking contaminated water or needles.

What is vehicle-borne transmission?

500

Providing rehabilitation services when needed in order to stop the progression of a disease that has already caused damage.

What is tertiary prevention?