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However, the prevalence of chewing tobacco among men and women may have been underestimated by about 11 % and 1.5 %, respectively, and smoking among males by 5 % and 0.5 %

10.1038/ncomms14329 225 ZhangZ.ChengX.YueL.CuiW.ZhouW.GaoJ.et al (2018)

A CT scan may indicate a sinus infection if any of these conditions is present: Air-fluid levels in one or more sinuses Total blockage in one or more sinuses Thickening of the inner lining (mucosa) of the sinuses Mucosal thickening can occur in people without symptoms of sinusitis

It's not recommended that you try to smoke if the room you're planning on doesn't have some kind of access to the outside