Respiratory tract infections range in severity from relatively mild infections such as the common cold to potentially life-threatening infections. The clinical presentation of patients with respiratory tract infections, particularly early in the disease course, often does not yield a specific diagnosis because the signs and symptoms are non-specific. While a specific diagnosis is not always necessary, reliable and timely diagnoses can be important in managing patient care, preventing the secondary spread of infection and implementing appropriate antibiotic or antiviral treatment. CTK’s respiratory products include OnSite Rapid Tests to diagnose acute respiratory infections, both viral and bacterial.