Most of these infectious diseases have been controlled or eradicated from most parts of Africa but are still causing epidemics in South Sudan due to poor socio-economic conditions.
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各国如果卫生系统薄弱，人口过多或民众流离失所，一旦受到冲突或自然灾害的冲击，很容易发生传染病疫情。
When countries are struck by conflict or natural disasters, exacerbated by weak health systems, overcrowding and population displacement, they are most vulnerable to infectious disease outbreaks.
Adding to the challenge is the weakness of disease surveillance systems, making it hard to measure the true scope of the problem, or to allow for the early detection of outbreaks and appropriate response.
WHO supports the early warningalert and response system (EWARS), a network of static and mobile partner-supported reporting sites, to enhance detection of disease outbreaks in populations of humanitarian concern.
There are now 58 EWARS reporting sites in South Sudan, and these sites will continue to be expanded to complement the existing surveillance system in areas affected by the crisis.
Despite the fragile security situation and challenging conditions to deliver health services, WHO, together with partners, is providing vital support for the people of South Sudan.
WHO trains rapid response teams to investigate and respond to emerging outbreaks and has prepositioned outbreak investigation and response kits for several infectious diseases, as well as for medical complications of severe acute malnutrition (SAM), at 9 state hubs.
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这些供应品被用于对全国范围新出现的疫情和人道主义紧急情况作出及时反应。
These supplies have been used to promptly respond to emerging outbreaks and humanitarian emergencies countrywide.