Think of how often you hear a new report on the TV or read something in the news paper related to health. Sometimes you may even alter your behavior or take a supplement based on this information. Remember that anyone can say anything, but not everyone can substantiate their claims with scientific data. The internet is at your finger tip. After reading this chapter think of how you will proceed next time you read an allegation of a cure or improve a condition and how likely you are to believe it. What would you require to give it validity…..

1. What does “ascertain” mean? Explain it in your own words and use it in a sentence related to epidemiology.