Yes it still harmful because it is air pollution to your lungs. My kid's pediatrician used to tell me that I should change my clothes after smoking a cigarette and before I carry my baby.
In Scrum, a product backlog item (PBI, backlog item, or item) is a unit of work small enough to be completed by a team in one Sprint iteration. Backlog items are decomposed into one or more tasks. See also backlog effort estimation unit.
Most Product Backlog Items (PBIs) initially need refinement because they are too large and poorly understood. Teams have found it useful to take a little time out of Sprint Execution â every Sprint â to help prepare the Product Backlog for the next Sprint Planning Meeting.