How many people were killed by gastrointestinal infections in 1990?
In 2010?
In which year, 1990 or 2010, did more people die in total in the United States?
In which year did, 1990 or 2010, did more people die of heart disease?
Which diseases are decreasing in prevalence from 1990 to 2010? Why do you think those diseases are becoming less of a problem in the United States?
Which diseases are increasing in prevalence from 1990 to 2010? Why do you think those diseases are becoming more of a problem in the United States?d