Viviana Sotomayor

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BLOCKINfocused BLOCKINattention BLOCKINon BLOCKINinfluenza BLOCKINsurveil-lance capabilities worldwide. In consultations before the 2009 BLOCKINoutbreak BLOCKINof BLOCKINinfluenza BLOCKINsubtype BLOCKINH1N1, BLOCKINthe BLOCKINWorld BLOCKINHealth Organization had concluded that the world was unprepared to respond to an influenza pandemic, due in part to(More)
A passive haemagglutination assay measuring antibody to highly purified Vi antigen, known to be sensitive and specific for the detection of chronic Salmonella typhi carriers in a non-endemic area, was assessed in an endemic area. A reciprocal serum Vi antibody titre of 160 was found to have a sensitivity of 75%, specificity of 92%, and a high predictive(More)
BACKGROUND The role of demographic factors, climatic conditions, school cycles, and connectivity patterns in shaping the spatio-temporal dynamics of pandemic influenza is not clearly understood. Here we analyzed the spatial, age and temporal evolution of the 2009 A/H1N1 influenza pandemic in Chile, a southern hemisphere country covering a long and narrow(More)
To determine effects of school breaks on influenza virus transmission in the Southern Hemisphere, we analyzed 2004-2010 influenza-like-illness surveillance data from Chile. Winter breaks were significantly associated with a two-thirds temporary incidence reduction among schoolchildren, which supports use of school closure to temporarily reduce illness,(More)
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