UC San Diego researchers say they can predict the spread of flu a week into the future with as much accuracy as Google Flu Trends can display levels of infection.
The study - appearing in Scientific Reports, an online journal from the publishers of Nature - uses social network analysis and combines the power of Google Flu Trends' "big data" with traditional flu monitoring data from the U.S. Centers for Disease Control and Prevention (CDC).
"Our innovation," said corresponding author Michael Davidson, a doctoral student in political science at UC San Diego, "is to construct a network of ties between different U.S. health regions based on information from the CDC. We asked: Which places in years past got the flu at about the same time? That told us which regions of the country have the strongest ties, or connections, and gave us the analytic power to improve Google's predictions."
By weighting GFT predictions with a social network derived from CDC reports on laboratory-tested cases of flu, the researchers were able to refine and improve GFT's predictions.
The researchers are optimistic their work will soon be put to public use. "We hope our method will be implemented by epidemiologists and data scientists," Davidson said, "to better target prevention and treatment efforts, especially during epidemics."
Davidson's co-authors are Dotan A. Haim, who is also a political science graduate student at UC San Diego, and Jennifer M. Radin, of the UC San Diego/San Diego State University Joint Doctoral Program in Public Health.
The study was funded in part by the Robert Wood Johnson Foundation and the James S. McDonnell Foundation.