Some scientists are taking a DIY coronavirus vaccine, and nobody knows if it’s legal or if it works

Preston Estep was alone in a borrowed laboratory, somewhere in Boston. No big company, no board meetings, no billion-dollar payout from Operation Warp Speed, the US government’s covid-19 vaccine funding program. No animal data. No ethics approval. What he did have: ingredients for a vaccine. And one willing volunteer. Estep swirled together the mixture and…