state what the ethical problems are in the case of covid 19 of the challenge testing? List Three reason? what are the problem? How are those terms problems ? What are the problems with them?

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A: Introduction: Evolution is the change in the inherited characteristics of biological populations ove...

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A: *Note : kindly repost for other questions. Dear Student as per the guidelines we are supposed to ans...

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A:

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A: Answer 

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Respiratory Infections

Respiratory infections are infectious diseases of the respiratory tract that are mostly caused by bacteria and viruses. They cause infections of the throat, sinuses, airway path, and lungs. Respiratory infections are typically divided into two types: upper tract respiratory infection and lower tract respiratory infection.