What population of individuals are most vulnerable to traffickers? Who Are They?

Human trafficking is not prejudiced. Depending on the supply and demand catchphrase, anyone can become a target and be lured into commercial human trafficking; trafficking for sex. But the most vulnerble population is the homeless, especially kids. Traffickters belieive that homelsee kids are mostly runaways, and that no one cares enough to miss them or go looking for them. This is why traffickters perfere the homeless population. and, anyone can be a trafficker!

What population of trafficked humans are the most venerable to trafficking? Why?