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Because respiratory problems are so often caused by environmental exposure to irritants and infectious agents, smoking tobacco and occupations that involve inhaling dangerous substances, many lung diseases can be prevented by following some simple guidelines:
· Do not smoke tobacco or street drugs such as marijuana or crack cocaine. ... Diseases of airflow obstruction and of lung stiffening give characteristic tracings with spirometry. ... With the exception of HBV, all the common viruses that cause hepatitis are known as RNA viruses because they contain ribonucleic acid or RNA as their genetic material.
Approximate Word count = 1113 Approximate Pages = 4.5 (250 words per page double spaced)
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