A vaccine claimed to be 90% effective represents an enormous achievement. We discuss what questions remain and the regulatory and distribution challenges ahead. A string of recent African elections reveals strongmen bending democracy to stay in office; will upcoming polls break it altogether? And a moral crusade in India doesn’t fit the country’s chill relationship with weed. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer
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