We explore the science, scalability, and (of course) economics surrounding the global vaccine race. Guests include the chief medical officer of the first U.S. firm to go to Phase 3 trials with a vaccine candidate; a former F.D.A. commissioner who’s been warning of a pandemic for years; and an economist who thinks Covid-19 may finally change how diseases are cured.

What happens when tens of millions of fantasy-sports players are suddenly able to bet real money on real games? We’re about to find out. A recent Supreme Court decision has cleared the way to bring an estimated $300 billion in black-market sports betting into the light. We sort out the winners and losers.