Increased asthma deaths in soft paper makers, is this the explanation of occupational asthma from cardboard dust?

Soft paper dust is not bleached or treated with surface coatings, the exposures were mainly 5-10 mg/ml. mostly cellulose. This study showed increased asthma mortality, particularly in the under 60's. This may have relevance to occupational asthma seen in workers exposed to cardboard dust, where there is a lack of known causes.

References

	Torén K, Neitzel R, Sallsten G, Andersson E, Occupational exposure to soft paper dust and mortality , Occup Environ Med, 2020;77:549-554,10.1136/oemed-2019-106394

	Knight D, Lopata AL, Nieuwenhuizen N, Jeebhay MF., Occupational asthma associated with bleached chlorine-free cellulose dust in a sanitary pad production plant., Am J Industr Med, 2018;61:952-958,DOI: 10.1002/ajim.22904

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