Unfortunately these institutions take a long time to build and a short time to destroy. How will we know what changes take place in the health of an individual

Unfortunately these institutions take a long time to build and a short time to destroy. How will we know what changes take place in the health of an individual working in the various dangerous occupations common in Alaska (logging, fishing, oil, and mining) over the course of 10 years. It takes 10 years to find out! How can workers demand payment for the true hazards they face if they don't know the hazards they face? Who benefits from ignorance?