Since the 1990s, effective public-health strategies to curb HIV transmission in drug users have led to drops in new infections in most countries. But over the same time period, seven countries have seen a 25% increase in new infections. Not coincidentally, five of these countries — mainly in Eastern Europe and Central Asia — employ aggressive drug war strategies, such as arresting and incarcerating users for drug or needle possession.

These tactics have been shown to be ineffective not only for controlling drug use, but also for reining in the spread of HIV. Why? Because the fear of recrimination prevents drug users from seeking clean needles — a major risk factor for HIV infection. In the U.S. as well, areas with the highest infection rates are those that have the most aggressive drug policies, the report shows. The solution is straightforward, if drastic; it requires a complete overhaul of current drug policy: drug users need treatment, not imprisonment, and drug possession needs to be decriminalized…