The world is at the brink of eradicating polio. A surprise polio outbreak in Israel in 2013 led researchers to look closely for the poliovirus in sewage to detect virus shed in the feces of non-paralyzed people infected with polio, what epidemiologists call the "silent circulation" of polio.
Science has proven that breastmilk is far better for human health than infant formula. Nevertheless, the US tried to stop a WHO resolution which aimed to limit the marketing of infant formula in developing countries.
Joy, whose name has been changed for this story, already tried leaving Nigeria once. It was 2005, when she was 22. A friend of the family offered her a job working as a nanny in Italy. Joy was thrilled to get the offer — she already had two children, and her young family needed the money.
We hear from three foreign journalists based in Washington about what their audience makes of Barack Obama's speech this week on race in America: joining us are Ewen MacAskill with Britain's Guardian newspaper