Summary:
- Diseases of the respiratory system include asthma, pneumonia, and emphysema.
- Smoking is the most significant cause of respiratory disease as well as cardiovascular disease and cancer.
- The common cold and flu are caused by viruses.
- The pathogens that cause colds, flu, and TB can be passed from person to person by coughing and sneezing.
- The quality of the air you breathe can affect the health of your lungs.
- Asthma, heart and lung diseases, allergies, and several types of cancers are all linked to air quality.