Harbor Freight Dust Collector – Health Hazard?

I purchased my Harbor Freight dust collector about a year ago and have used it at least once a week since then. Every time I visited the shop and used it, I found myself becoming congested and slowly becoming more sick. By the time I had enough of it, I had problems in my eyes, ears, nose, throat, and lungs and several trips to the doctor followed. Just the cost of medical bills alone would have set me up nicely with a ClearVue CV1800.