At this website for the Center for Disease Control, you can retrieve information about diseases. The site includes a section on traveler's health.
This is the website of the National Institute of Health.
http://www.metrokc.gov/health/nutrition
This is the website for the World Health Organization. Information on diseases and epidemics is available here.
Site includes BMI calculator.
http://library.bhbl.neric.org/mshealth/PubertyWebQuest.htm
Internet WebQuest for Grade 6.