“…If the number of lung cancers detected by LDCT is taken as surrogate for the potency of asbestos fibres, mixed fibres (crocidolite and chrysotile) might have caused more cancers than crocidolite and it is tempting to attribute this to the strong association of chrysotile exposure with the occurrence of lung cancer. [12][13][14][15] Hypotheses about the carcinogenicity of asbestos become even more complex, when the interaction between smoking and asbestos exposure is considered. The smallest fragments of asbestos belong to the 'fine dust' (PM2.5) category.…”