Competing global statistics on prevalence of injecting drug use: why does it matter and what can be done?

An editorial is presented which examines the authors' views about a variation in global statistics regarding the prevalence of injecting (intravenous) and opioid drug abuse, and it mentions how some studies use alternative information sources and give value to unreferened country estimates. The 2017 World Drug Report and a Global Burden of Disease (GBD) study are examined, along with cocaine and methamphetamine abuse.