article_metadata: Anette Hulth Gustaf Rydevik Annika Linde
article_metadata: 10.1371/journal.pone.0004378
article_metadata: PLoS One
article_metadata: 2009;4(2):e4378.
article_metadata: CC BY
article_metadata: https://pubmed.ncbi.nlm.nih.gov/19197389/
article_metadata: Influenza, Human / epidemiology Internet Sentinel Surveillance
article_metadata: Influenza, Human / epidemiology Internet Sentinel Surveillance Research Support, Non-U.S. Gov't Humans Reproducibility of Results Time Factors
article_metadata: PMC2634970
article_metadata: 19197389
article_metadata: Web queries as a source for syndromic surveillance
article_metadata: 2009