During the subjects with bronchial asthma, IgE antibodies unique to TDI, MDI, or hexamethylene diisocyanate (HDI) were only located in one issue who was occupationally exposed. No discrepancies during the prevalence of respiratory indicators were being identified. Wilder et al. (2011) did not find a big boost in the prevalence https://costabull.com/product/toluene-diisocyanate-tdi-80-20/