is a viral infection of the upper respiratory tract caused by many different viruses.
A.gastrointestinal disease
B.common cold
C.diarrhea
D.cholera
A.gastrointestinal disease
B.common cold
C.diarrhea
D.cholera
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B. Common cold
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ANSWER: B.common cold
EXPLANATION: Viral upper respiratory tract infections may occur at any age and include the common cold and influenza. Lower respiratory tract infections: Symptoms occur in the windpipe, airways, and lungs. Viral lower respiratory tract infections are more common among children and include croup, bronchiolitis, and pneumonia.
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