Hints of the long campaign ahead are emerging, but all the operations so far are just drawing the eventual, full-scale battle lines. Cheap vaccinations could save millions of lives lost to cervical cancer; we ask why and where jab rates are falling. And why airlines have more money tied up in Nigeria than in the rest of the world combined.For full access to print, digital and audio editions of The Economist, try a free 30-day digital subscription by going to www.economist.com/intelligenceoffer Hosted on Acast. See acast.com/privacy for more information.