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For Each Historical Identification Question, Define the Term and Briefly

question 18

Essay

For each historical identification question, define the term and briefly describe its historical significance.
Kristallnacht


Definitions:

Community Immunity

Also known as herd immunity, it is the resistance to the spread of a contagious disease within a population that results if a sufficiently high proportion of individuals are immune to the disease, especially through vaccination.

Type A Blood

A blood group within the ABO system characterized by the presence of A antigens and anti-B antibodies in the plasma.

Antibodies

Antibodies are protein molecules produced by the immune system in response to foreign substances, helping to fight off infections.

Periodontitis

A serious gum infection that damages the soft tissue and destroys the bone that supports teeth, possibly leading to tooth loss.

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