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Missing Attachments; Letter to Dr. Walter Dowdle of the Centers for Disease Control (CDC) from Dr. Carl Ehmann of R.J. Reynolds discussing potential of tuberculosis transmission on airplanes due to poor ventilation. Discusses problem of focusing air quality debate on tobacco smoke. Disputes claims of health effects of smoke in airplanes. Provides data on other health issues in the context of the ... read morepotential ban on smoking on international flights.read less
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