• 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.
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