| 3. What are the Center of disease Control (CDC) guidelines for the transmission of TB? The CDC guidelines for the transmission of tuberculosis recommend that only filters with an efficiency of 99.97% tested at 0.3 microns particle size or smaller be used. Intersurgical’s Filta-Therm ® and Filta-Guard TM have been tested with particles as small as 0.017 microns and achieved a 99.999% filtration efficiency at that particle size.
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