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Showing 1 - 12 of 12 Items
Showing 1 - 12 of 12 Items
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Journal Article
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Short Report

Explaining seasonal fluctuations of measles in Niger using nighttime lights imagery

Bharti N, Tatem AJ, Ferrari MJ, Grais RF, Djibo A,  et al.
2011-12-09 • Science
2011-12-09 • Science
Measles epidemics in West Africa cause a significant proportion of vaccine-preventable childhood mortality. Epidemics are strongly seasonal, but the drivers of these fluctuations are poo...
Journal Article
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Research

Spatial dynamics of meningococcal meningitis in Niger: observed patterns in comparison with measles

Bharti N, Broutin H, Grais RF, Ferrari MJ, Djibo A,  et al.
2011-10-05 • Epidemiology and Infection
2011-10-05 • Epidemiology and Infection
Throughout the African meningitis belt, meningococcal meningitis outbreaks occur only during the dry season. Measles in Niger exhibits similar seasonality, where increased population den...
Journal Article
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Research

Rural-urban gradient in seasonal forcing of measles transmission in Niger

Ferrari MJ, Djibo A, Grais RF, Bharti N, Grenfell BT,  et al.
2010-09-22 • Proceedings. Biological sciences / The Royal Society
2010-09-22 • Proceedings. Biological sciences / The Royal Society
Seasonally driven cycles of incidence have been consistently observed for a range of directly transmitted pathogens. Though frequently observed, the mechanism of seasonality for directly...
Journal Article
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Commentary

Serology for SARS-CoV-2: Apprehensions, opportunities, and the path forward

Bryant JE, Azman AS, Ferrari MJ, Arnold BF, Boni MF,  et al.
2020-05-19 • Science Immunology
2020-05-19 • Science Immunology
Serological testing for SARS-CoV-2 has enormous potential to contribute to COVID-19 pandemic response efforts. However, the required performance characteristics of antibody tests will cr...
Journal Article
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Research

Estimating transmission intensity for a measles epidemic in Niamey, Niger: lessons for intervention

Grais RF, Ferrari MJ, Dubray C, Bjørnstad ON, Grenfell BT,  et al.
2006-09-01 • Transactions of the Royal Society of Tropical Medicine and Hygiene
2006-09-01 • Transactions of the Royal Society of Tropical Medicine and Hygiene
The objective of this study is to estimate the effective reproductive ratio for the 2003-2004 measles epidemic in Niamey, Niger. Using the results of a retrospective and prospective stud...
Journal Article
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Research

Time is of the essence: exploring a measles outbreak response vaccination in Niamey, Niger

Grais RF, Conlan AJK, Ferrari MJ, Djibo A, Le Menach A,  et al.
2008-01-06 • Journal of the Royal Society Interface
2008-01-06 • Journal of the Royal Society Interface
The current World Health Organization recommendations for response during measles epidemics focus on case management rather than outbreak response vaccination (ORV) campaigns, which may ...
Journal Article
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Research

The dynamics of measles in sub-Saharan Africa

Ferrari MJ, Grais RF, Bharti N, Conlan AJK, Bjørnstad ON,  et al.
2008-02-07 • Nature
2008-02-07 • Nature
Although vaccination has almost eliminated measles in parts of the world, the disease remains a major killer in some high birth rate countries of the Sahel. On the basis of measles dynam...
Journal Article
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Research

Modelling the first dose of measles vaccination: the role of maternal immunity, demographic factors, and delivery systems

Metcalf CJ, Klepac P, Ferrari MJ, Grais RF, Djibo A,  et al.
2010-06-01 • Epidemiology and Infection
2010-06-01 • Epidemiology and Infection
Measles vaccine efficacy is higher at 12 months than 9 months because of maternal immunity, but delaying vaccination exposes the children most vulnerable to measles mortality to infectio...
Journal Article
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Research

Reaching hard-to-reach individuals: nonselective versus targeted outbreak response vaccination for measles

Minetti A, Hurtado N, Grais RF, Ferrari MJ
2014-01-15 • American Journal of Epidemiology
2014-01-15 • American Journal of Epidemiology
Current mass vaccination campaigns in measles outbreak response are nonselective with respect to the immune status of individuals. However, the heterogeneity in immunity, due to previous...
Journal Article
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Research

Modelling the relative benefits of using the measles vaccine outside cold chain for outbreak response

Azam JM, Saitta B, Bonner K, Ferrari MJ, Pulliam JRC
2021-09-01 • Vaccine
2021-09-01 • Vaccine
INTRODUCTION
Rapid outbreak response vaccination is a strategy for measles control and elimination. Measles vaccines must be stored and transported within a specified temperature ran...
Journal Article
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Research

Time is (still) of the essence: quantifying the impact of emergency meningitis vaccination response in Katsina State, Nigeria

Ferrari MJ, Fermon F, Nackers F, Llosa AE, Magone C,  et al.
2014-09-05 • International Health
2014-09-05 • International Health
In 2009, a large meningitis A epidemic affected a broad region of northern Nigeria and southern Niger, resulting in more than 75 000 cases and 4000 deaths. In collaboration with state an...
Journal Article
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Research

Sub-national variation in measles vaccine coverage and outbreak risk: a case study from a 2010 outbreak in Malawi

Kundrick A, Huang Z, Carran S, Kagoli M, Grais RF,  et al.
2018-06-15 • BMC Public Health
2018-06-15 • BMC Public Health
BACKGROUND
Despite progress towards increasing global vaccination coverage, measles continues to be one of the leading, preventable causes of death among children worldwide. Whether ...