Mobile Messaging as Surveillance Tool during Pandemic (H1N1) 2009, Mexico
Figure. Proportion of severe cases of influenza-like illness (ILI) in Mexico, April 2009, from unstructured supplementary service data survey and confirmed and suspected cases of pandemic (H1N1) 2009 from Sistema Nacional de Vigilancia Epidemiológica. Suspected cases of pandemic (H1N1) 2009 are ILI cases for which no laboratory confirmation was possible. The daily proportion of reported severe cases and daily counts of confirmed and suspected cases of pandemic (H1N1) 2009 were smoothed by using a 5-day moving average.