This guidance from the WHO provides recommendations for preventing viral hepatitis B and C among people who inject drugs. Key recommendations include: 1) Offering people who inject drugs either a standard or rapid hepatitis B vaccination schedule, as both help increase uptake and completion rates. 2) Providing incentives to increase completion of the hepatitis B vaccine schedule. 3) Distributing low dead-space syringes through needle and syringe programs, as they reduce the amount of blood and virus remaining after injection compared to standard syringes. 4) Not suggesting psychosocial interventions alone but suggesting offering peer interventions to reduce viral hepatitis incidence. The guidance emphasizes fully implementing existing recommendations for a comprehensive prevention package, including