There was a terrific article in the New Yorker a few months back written by one of their writers (Jerome Groopman of the Beth Israel Hospital/Harvard Med)who happens to be a world famous AIDs researcher and has written many books on health care.
Here is the link:
http://www.newyorker.com/reporting/2009/02/09/090209fa_fact_groopman
Here is the link:
http://www.newyorker.com/reporting/2009/02/09/090209fa_fact_groopman