Global reduction in measles mortality

The Lancet  
Oct 13, 2012  Volume 380  Number 9850  p1281 – 1358
http://www.thelancet.com/journals/lancet/issue/current

Correspondence
Global reduction in measles mortality
Suman Saurabh, Ritesh Kumar
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Emily Simons and colleagues’ insightful Article (June 9, p 2173)1 draws highly relevant conclusions for measles control.

Global reduction in measles mortality
David N Durrheim
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The recent stalling of measles elimination efforts in Europe and Africa, and downwards revision of estimated measles deaths prevented, has tempered optimism that this killer of children will soon be vanquished.1–3 Progress in the Western Pacific region provides welcome optimism. Measles incidence declined from 27·0 in 2010 to 11·6 per million population in 2011.4

Global reduction in measles mortality
Michael Noll-Hussong
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The study by Emily Simons and colleagues1 raises the important issue of measles surveillance and the intensified control measures that are needed to achieve mortality reduction targets. Simons and colleagues focus on the established spectrum of surveillance methods in their modelling approach, but one recently evolving surveillance technique should also be considered: internet search engine analytics.

Global reduction in measles mortality – Authors’ reply
Emily Simons, Matthew Ferrari, Peter Strebel
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In response to Suman Saurabh and Ritesh Kumar, although the rate of infection shares some features of SIR models, our aim was to use a flexible formulation that reproduced the key features of an SIR-type model. Specifically, the infection rate should scale positively with the proportion of the population that is susceptible. As correctly noted, we assume that the force of infection is constant throughout the year, although standard SIR formulations suggest the force of infection should change through time as S/N and I fluctuate.