It is mostly the fine dust which gives people, and particularly people
with allergies, the most problems. It's not the wood chips. Many exotic
woods also contain carcinogens which are harmful. There has been a lot
of literature written about this. I have, as part of my DC system, a
single stage dust collector with a 5-micron bag, an air filtration unit
and a couple of portable vacs. In addition I always use a dust mask.
Prevention is the best cure I know of.