Preschoolers Drive Flu Epidemics

Surveillance Data Suggest That Preschoolers Drive Flu Epidemics. I found this linked off a social network analysis blog, bemoaning the lack of SNA in the study. I would have thought epidemiology was all up on social networks as a mechanism of disease spread. At least on TV the CDC are -- even if it's just a masked doctor asking who the carrier had contact with in the last 2 days, and then sweating and hissing, "It's getting out of control, shut down O'Hare and then LAX!!"

Quote:"The data suggest that when kids are sneezing, the elderly begin to die. Three- and 4-year-olds are sentinels that allow us to focus our surveillance systems." I wish they better explained what the "biosurveillance" system is.