Getting sick is no fun. The common cold and even the flu are considered respiratory infections – bugs that attack the respiratory tract. A virus often causes respiratory infections. Respiratory infections are connected to your oral health because your mouth can transmit those diseases in the form of coughing or sneezing. Also, oral hygiene is strongly linked to overall health. Learn what causes respiratory infections, learn more about the connection between oral health and respiratory infections, and tips for preventing and treating disease.