Immunity - Topic 2 Flashcards

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1
Q

What is a vaccine?

A

A mixture containing microbes that normally cause disease, but which have been treated so that they are harmless. It is injected in the body to make them immune to the disease

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2
Q

What is active immunity?

A

Immunity that develops when a person is exposed to a disease-causing microbe and produces their own antibodies to fight it. This can be through getting the disease or being injected with a vaccine which contains a dead or inactive version of the microbe.

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3
Q

What is passive immunity?

A

Immunity which is given to a person through vaccination with ready-made antibodies.

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4
Q

What is herd immunity?

A

Immunity that occurs when a larger portion of the population have been vaccinated against a disease. It prevents the spread of disease and therefore protects individual who have not developed immunity.

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5
Q

Describe the role of T-cells in immunity?

A

Protect you by destroying harmful pathogens and by sending signals that help control your immune system’s response to threats.

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