This document provides recommendations for aspirin use for primary prevention of cardiovascular disease. It recommends aspirin for adults aged 60-69 years who have a 10-year CVD risk of 10% or higher, no increased bleeding risk, a life expectancy of at least 10 years, and a willingness to take aspirin for at least 10 years. It finds insufficient evidence for aspirin's primary prevention in adults aged 50-59 years or 70 years and older.