If you work in a coal mine, you expect to be exposed to a physically toxic environment. If you work in an office, you do not. Yet, sick buildings are so persistent that you may be exposed to harmful air and surroundings that impact your health. With poor health it is an uphill battle to offer up the best your mind has to offer and perform your best work. Don't put up with it. Take care of yourself. And, if you can, help take care of others.