Abstract Background Drug injection has been increasing over the past decades all over the world. Hepatitis B and C viruses (HBV and HCV) are two common infections among people who inject drugs (PWID) and more than 60% of new human immunodeficiency virus (HIV) cases are PWID. Thus. investigating risk factors associated with drug use transition to injection is essential and was the aim ... https://www.learningepistemology.com/product-category/hair-wax/