Ok, consider that you are able to limit what you are exposed to. My Micro Professor preached that it is "All About the Numbers" i.e. how much you are exposed. Well, take a
man/woman that smokes for
1 year and quits smoking
vs a
man/woman that smokes for
many more years. Who is at a higher risk for Cancer? The man/woman who smokes for many years is and the longer that person smokes the higher the risk. Sure it's not an guarantee you will have cancer from smoking, but you don't know if you might win the Lucky Life Lottery.
!!!!!!!

The main thing to know/understand is that smoking and drinking alcoholic beverages at the same time about doubles your risk. The alcohol acts as an adhesive. So, the same applies to Occupational exposures right? If you smoke and are exposed to noxious fumes, dust, metals etc. you are at increased risk. I do not know all of OSHA guidelines however I do know there are mandates for companies/workers to wear PPE (Personal Protective Equipment) such as masks, eye protection/goggles, special suits and/or a respirator where occupational hazzards apply.
I am not in your shoes, I know, but when I go to work in the Hospital I am going to wear gloves when coming in contact with blood, medications and bodily fluids. I have an obligation to myself first, my family, the patient and the public. So, if they aren't providing PPE, go buy some. You might be setting an example and you may save someone elses life while saving yours. It's a small investment.
Be True to Yourself By Being True To Your Mind and Body.
__________________
Star30
Florence Nightingale: It may seem a strange principle to enunciate as the very first requirement in a Hospital that it should do the sick no harm. [1859]