We hear and read a lot about the health risks of shisha (hookah) consumption. One newspaper claims that one hour of shisha is equivalent to 20 cigarettes, another to 50, and still others to 100. Everywhere, the harm of shisha is asserted, but the sources of these judgments seem scattered and unreliable. What is the actual harm of shisha? Darnashop provides an update on the current state of knowledge for you...