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.
1 Responsibilities of the Product Owner, Scrum Development Team, and Scrum Master. Definition of Product Backlog and Sprint Backlog. Five Scrum meetings and example schedule.  Scrum Quiz, a practice test to help prepare for class and the Certified Scrum Master (CSM) exam, or others.