The race to deliver a Covid-19 vaccine has been likened to a moonshot, but in several ways landing a man on the moon was easier. In his new book, “A Shot in the Arm: How Science, Engineering, and Supply Chains Converged to Vaccinate the World” (MIT CTL Media, 2021), MIT Professor Yossi Sheffi recounts the vaccine’s extraordinary journey from scientific breakthroughs to coronavirus antidote and mass vaccination. And he explores how the mission could transform the fight against deadly diseases and other global-scale challenges. “The historic Apollo moonshots built a…