Salathé, MarcelFreifeld, Clark CMekaru, Sumiko RTomasulo, Anna FBrownstein, John S2015-12-102015-12-102015-12-10201310.1056/NEJMp1307752https://infoscience.epfl.ch/handle/20.500.14299/121622Disease OutbreaksInfluenza A virusMass MediaSocial MediaInfluenza A (H7N9) and the importance of digital epidemiologytext::journal::journal article::research article