Hi, welcome to our site. I am Dr Saumya Mittal.
Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query
The fact remains that passive smokers are at a greater risk that the normal population. Some studies have suggested a higher risk in fact.
The problem arises that
passive smoking is not just about the gases. There are huge number of particulate matter that attaches to the personal affects of the person like clothing.
The best idea would be to change your working area. Of course that is not always possible.
A air purifier is a good idea but will have limited value (as explained about particulate matter).
Now for the last part of the query, I need to know where you are from and whats your budget.
I hope this helps you. Best of luck.
I have given you the answer to the maximum considering the information provided. Looking forward to your return query with the details asked so that I can help you further.
(If the answer has helped you, please indicate this)