File illustration photo shows girls walking home from school in the province of Kunduz, Afghanistan. Alleged poisonings of Afghan schoolgirls by Taliban insurgents regularly make headlines -- but ... more 

File illustration photo shows girls walking home from school in the province of Kunduz, Afghanistan. Alleged poisonings of Afghan schoolgirls by Taliban insurgents regularly make headlines -- but there are signs the incidents could be cases of mass hysteria, say specialists in the field less