Upper respiratory tract infections are one of the most common reasons people visit their provider, and the most common illness resulting in missed work or school. Learn more about Upper Respiratory Tract Infection.
Lower respiratory tract infections are infections that affect the bronchi, bronchioles, and lungs. Learn more about Lower Respiratory Tract Infection.
Influenza, commonly called the flu, is a contagious, systemic respiratory illness that can affect both the upper and lower respiratory tracts. Learn more about Influenza.