Communicable respiratory illnesses spread from person to person and cause symptoms in our breathing system, from our noses down to our lungs. Depending on the disease the infection may spread through direct physical contact with others, contact with items that others have touched, or through droplets or aerosols that people who are infected exhale into the air. Reported cases of respiratory illnesses are tracked to identify patterns, enable healthcare planning, and empower residents at higher risk of complications.