Sure, but the health impact of a modern laser printer is on par with other daily health hazards at worst. Modern toner shouldn’t contain anything dangerous, nanoparticles could be a problem depending on amount of printing and the printer model, but if you live in a city you will breathe in more by opening a window. Ozone is emmited during printing but in small enough amounts that it will be problematic only in a small room with shit ventilation and tons of printing, and I mean tons, atleast a couple of books worth.