The CDC calls these kinds of masks International filtering facepiece respirator, because they are tested to international standards and not NIOSH standards, meaning they may not have the rigorous quality assurance requirements meeting those [masks] that are NIOSH Approved. What about N95 masks with exhalation valves
Letter: Smoking and the fetus
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20 The TFG strategy was estimated to have the biggest impact on reducing smoking prevalence, particularly over the longer term, and also had the greatest effect on reducing ethnic disparities in smoking
We excluded Hawaii and Alaska because they did not share a border with the other states, and modeling their cigarette consumption and illicit trade would necessarily involve very different considerations from the major variables for the other 48 states