Widespread looting and the worst violence since apartheid continue, exposing ethnic divisions and the persistent influence of Jacob Zuma, a former president. How to quell the tensions? As some countries administer third covid-19 “booster shots” we ask about the epidemiological and moral cases for and against them. And the bids to reverse the decline of America’s national pastime.

For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer