You can look at the ICD9 to ICD10 transition we are finally making. ICD9 is 30 years old. The ICD codes can basically be used for classifying mortality. Poli

You can look at the ICD9 to ICD10 transition we are finally making. ICD9 is 30 years old. The ICD codes can basically be used for classifying mortality. Polio is one of the first codes on the ICD9 list. I believe its rank had to do with the amount of people it killed. Thankfully, it is no longer #1 on the list. There is an interesting Ted talk on this: http://www.ted.com/talks/hans_rosling_reveals_new_insights_on_poverty.html http://www.ted.com/talks/hans_rosling_reveals_new_insights_o...