All Homeless Children and Youth are Vulnerable 
There has been a lot of recent media attention discussing how the federal government tracks and accounts for homeless children in our society. The U.S. Department of Housing and Urban Development reports there were 127,787 homeless children under 18 in the United States in 2015. In contrast, the U.S. Department of Education identified 1.3 million homeless students attending public schools in the 2013-2014 school year, which is double the number of students identified since the start of the recession.
No matter which data you look to, it is indisputable that children and youth make up a large percentage of the homeless population in the United States. And they are all vulnerable.