An officer who witnessed the incident, said it seemed to happen “all at once.”
“It seemed like it happened over the course of just a few minutes,” he said. “Suddenly we had several people down on the ground experiencing some type of cardiac arrest or medical episode and so we immediately started doing CPR and moving people.”. https://www.click2houston.com/news/local/2021/11/06/hfd-responding-to-reports-of-multiple-injuries-at-astroworld-festival/
"Paramedics transported at least 17 people to the hospital, one as young as 10 years old. Eleven of those transported were in cardiac arrest, Pena said. Over 300 people were tended to on site throughout the day."
17, you say
That's my thought and one of the articles I read said one was 10.