witter could help fight spread of disease
"Citation: Freifeld CC, Chunara R, Mekaru SR, Chan EH, Kass-Hout T, et al. (2010) Participatory Epidemiology: Use of Mobile Phones for Community-Based Health Reporting. PLoS Med 7(12): e1000376. doi:10.1371/journal.pmed.1000376"