The CDC is launching its first investigation into e-scooter injuries. A close reading of the findings thus far suggests that the primary problem isn’t the machines, it’s the humans. “Preliminary observations from the study found that the vast majority of injuries — 98 percent of them — happen to riders who aren’t wearing helmets. Nearly half of all riders involved in accidents had a blood alcohol level above the legal limit, while 52 percent tested positive for an illicit substance. Taylor noted that while many people believe accidents occur at night, they happen at all hours of the day. They also rarely involve another vehicle.”