Respiratory tract infection (RTI) can refer to any infection of the lungs and airways, so it includes a range of conditions - colds, flu, sinusitis, bronchitis etc. Upper RTIs affect the nose, throat and sinuses. Lower RTIs affect the lungs and lower airways. You can help protect yourself against these infections by avoiding tobacco smoke, following a healthy lifestyle (regular exercise, enough rest, a nutritious diet rich in fruit and vegetables), and conscientious handwashing (germs are often picked up from surfaces and transferred to the respiratory tract from hands). Most RTIs
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