Scientific American Will Giving COVID Booster Shots Make It Harder to Vaccinate the Rest of the World? But one billion doses would be nowhere near enough to achieve the WHO’s goal of vaccinating 70 percent of the world by June 2022—and this is where widespread booster campaigns could become a problem. “I understand why a politician would like to say, ‘I want to do both’” booster campaigns and donations, says health law expert […]