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What Is the Difference Between a Primary Key and a Secondary

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What is the difference between a primary key and a secondary key?


Definitions:

Influenza

A viral infection that attacks the respiratory system, causing symptoms such as fever, cough, and body aches.

Host's Susceptibility

The degree of sensitivity of a host organism to harmful effects from pathogens or environmental factors.

Nutritional Status

An assessment of an individual's health as influenced by the intake and utilization of nutrients.

Virulence

A microorganism's disease-producing power.

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