Over 300 workplace substances have been identified to cause new-onset asthma and the list continues to grow 1, 2. Other substances can aggravate pre-existing asthma, causing increased illness and medication requirements. Work-related asthma (WRA) comprises both new-onset and work-aggravated asthma3. An estimated 15-55% of all adult asthma is related to work4-7.

Silicosis is a lung disease caused by exposure to airborne silica. Generally, it causes scarring (pulmonary fibrosis) after 20 or more years of exposure. Since 1988, Michigan has been identifying individuals who develop silicosis with the goal of targeting prevention actions. Michigan’s system is both the longest running and only comprehensive surveillance system for silicosis in the United States.