Despite the fact that I couldn't find any articles about parent's concerns about exchange student programs, there is many pages that help hosting parents with taking care of an exchange students. Even thought it doesn't really help with my question, it can point out exactly of what are those hosting parents afraid of and what can be the main concerns of parents of an exchange student as well.

http://blog.exchangemom.com/tag/travel-insurance/

http://www.rotary-youth-exchange.com/yeo/docs/Host%20Parent%20Guide%20rev%20Mar09.pdf

As in my case of an exchange student my host family had no idea as far as my health insurance policy or what to do when sick, or many important thing that concerned my parents the most. I would like to include that in my paper as well.