Images of the swath of devastation wrought by Typhoon Haiyan in the central Philippines are reminiscent of the tsunami's aftermath in Banda Aceh, Indonesia nearly a decade ago.
And indeed, the World Health Organization grades the great typhoon of 2013 as a Category 3 disaster – its most severe category.
"The scale [of the typhoon's damage] is huge," Dr. Richard Brennan of the World Health Organization tells Shots. "It's monumental. This is one of the biggest emergencies we've dealt with in some time."
A spokesman for the World Health Organization said Thursday that it was mistaken about the polio outbreak in Somalia spreading to South Sudan. The virus has been detected in Kenya and Ethiopia this year. But South Sudan has not recorded a polio case since 2009.
The World Health Organization is investigating a cluster of possible polio cases in an eastern province of Syria.
If the cases are confirmed, they'd be the first ones in the war-torn nation in more than a decade. The country eliminated polio in 1999.
Syria used to have one of the highest polio vaccination rates in the region. If the virus has returned, it would be a high-profile example of the ramifications of the collapse of Syria's once-vaunted public health system.
The World Health Organization says the Syrian civil war is currently the worst ongoing humanitarian crisis on earth.
Aid groups have been scrambling to provide shelter, food, water and health care to the huge numbers of people who've been uprooted by the fighting. The big question now is whether U.S. military action could spark another wave of refugees and make the situation worse.
Israel is in the midst of a massive, emergency immunization drive of all children under the age of 9 against polio.
Health workers detected the virus in southern Israel in February. Since then, they've found it in 85 different sewage samples across the country, the Global Polio Eradication Initiative said Wednesday. Yet so far, no children have gotten sick or been paralyzed by the virus.