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Who is referred to as 'Patient Zero'?

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The first person identified as having a particular infectious disease in an outbreak.

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What is a pandemic?

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An epidemic that has spread over multiple countries or continents, affecting a large number of people.

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What does immunity refer to?

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The ability to resist infection or disease.

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What does zoonotic refer to?

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Diseases that can be transmitted from animals to humans.

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What is an epidemic?

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A sudden increase in the number of cases of a disease above what is normally expected in a specific area.

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What is the role of an epidemiologist?

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A person who studies diseases and their patterns in populations.

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What is a vector in epidemiology?

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An organism that transmits pathogens from one host to another.

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What is herd immunity?

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When a large percentage of a population becomes immune to a disease, making its spread unlikely.

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What is a vaccine?

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A substance that stimulates the body's immune response against a specific disease.

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What is the difference between an outbreak and an epidemic?

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An outbreak is a sudden increase in cases in a localized area, while an epidemic is a larger scale increase.