Respiratory tract infection | |
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Conducting passages | |
Specialty | Infectious disease |
Respiratory tract infections (RTIs) are infectious diseases involving the lower or upper respiratory tract.[1] An infection of this type usually is further classified as an upper respiratory tract infection (URI or URTI) or a lower respiratory tract infection (LRI or LRTI). Lower respiratory infections, such as pneumonia, tend to be far more severe than upper respiratory infections, such as the common cold.