PAKISTAN’S anti-polio campaign has once more been marred by bloodshed. Over the past week alone, three security personnel guarding vaccination teams were gunned down in Swat, Nowshera and Surab. Similar attacks earlier this year in Waziristan, Mastung and Noshki claimed more lives. Each incident reminds us that the fight against polio in Pakistan is as much about defeating extremism and misinformation as it is about delivering two drops of vaccine. This month’s nationwide immunisation drive aims to reach more than 45m children under five. The campaign, running from Oct 13 to 19, comes amid a resurgence of poliovirus,........

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