UNHCR said Yemen's health care system "has in effect collapsed", with the virus thought to be spreading throughout the country, and appealed for urgent funding last week.
The international community must act in tandem to prevent a major food shortage that will disproportionately hurt developing countries.
Experts warn that the ongoing Covid-19 pandemic will cause global famines of 'biblical proportions'.
Wealthy nations will have less food security as developing nations cut back on food exports.
Yemen, the Democratic Republic of Congo, Afghanistan and Syria among the eight nations accounting for two-thirds of the total number of people worldwide exposed to the risk of famine, report says.
With the world's largest amount of malnourished children, can India come to grips with its problem?
A young software engineer Oscar Ekponimo developed an app, Chowberry, which connects grocery stores with non-profits and non-profits with hungry people.
According to report released by UNICEF more than 700.000 children under 5 year of age suffer from acute malnutrition. UNICEF is urging to provide assistance in the Democratic Republic of Congo's Kasai region.
Over 1.2 million people in war-torn South Sudan are one step away from famine and in early 2018 half the country's population will be reliant on emergency food aid, the UN humanitarian chief says.
Some 2.7 million Kenyans are struggling with hunger after the country was hit hard by two years of drought.
Only three of Africa's 54 countries - Tunisia, Algeria, and Morocco - are considered to have low levels of hunger, according to a Global Hunger Index (Africa Edition) report.
A UN-backed food security report said South Sudan is no longer classified as being in famine, although the situation is still critical and millions face food insecurity.
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