A new sensor can detect cocaine, heroin, and fentanyl, even when they are combined with other drugs or additives like sugar and caffeine.

More than 80% of New Yorkers who inject drugs test positive for the opioid fentanyl, but only 18% report using it intentionally.

Naloxone can saves the lives of people who take high-dose opioids, but less than 2% of those who need it actually get it.