Polio Was Almost Eradicated. This Year It Staged a Comeback.
At the beginning of this year, there was a thrum of excitement among global health experts: Eradication of polio, a centuries-old foe that has paralyzed legions of children around the globe, seemed tantalizingly close. Pakistan, one of only two countries where wild poliovirus still circulates, had not recorded cases in more than a year. Afghanistan…