Vulnerability to Ebola and Lassa Fever can Now be Properly Assessed, Says Research

by Colleen Fleiss on  June 5, 2019 at 7:11 PM Tropical Disease News
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Identifying vulnerabilities to Ebola and Lassa fever outbreaks is now possible, revealed research from the University of Surrey and University of Cambridge. This will aid government agencies and health organisations in evaluating a country's vulnerability to outbreaks, and inform decisions on strategic investments and plans.
Vulnerability to Ebola and Lassa Fever can Now be Properly Assessed, Says Research
Vulnerability to Ebola and Lassa Fever can Now be Properly Assessed, Says Research

Vulnerability - an assessment of a country's ability or inability to resist a hazard or to respond when a disaster has occurred - is a well-established model in the field of climate change and natural disasters; however, in disease management it is a relatively undefined concept. To assess this kind of vulnerability researchers developed a new methodology that - instead of focussing on the confirmed number of patients infected with the disease (impact) - monitors the number of survivors ('adaptive capacity'). A simple mathematical formula of impact versus adaptive capacity has been used to calculate a degree of vulnerability, which will help international bodies allocate resources.

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To test their model researchers examined data from Lassa fever epidemics in Nigeria (2017 - 2018) and Sierra Leone (2008 - 2012) and Ebola in Sierra Leone (2013 - 2016). Using the methodology, researchers found that the most vulnerable states are not necessarily those with the highest number of confirmed cases; for instance, the state of Plateau in Nigeria was found to be the most vulnerable to Lassa fever despite the relatively low burden of the disease in the region.

Researchers also found that vulnerability can change during an outbreak. The vulnerability to Lassa fever in Nigeria decreased during of epidemics compared to the vulnerability for Sierra Leone that increased after 2010, indicating a rising number of deaths. The data available suggests a difficulty in coping with the disease in the region.

The next step is to investigate how vulnerability depends on relevant environmental and socio-economic indicators, for example health expenditure, which might suggest practical approaches for the reduction of vulnerability.

Dr Gianni Lo Iacono, Lecturer in Biostatistics and Epidemiology at the School of Veterinary Science at the University of Surrey, said: "The increasing danger of zoonotic diseases, such as Ebola and Lassa fever, has led to an urgent need to develop techniques to help public health practitioners evaluate how vulnerable populations are to epidemics.

Source: Eurekalert

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