It was a result of literally. decades of progress, slow and false starts, bad things that didn't work. But they were once they got focused on it and were able to use that past knowledge. I think my members at the weekend that they actually were able to specify the formula they thought would be effective. We didn't know if it would be.
When there's no vaccine on the market, people will look for other ways to be safe, including school closures and the handwashing of groceries. Listen as economist Casey Mulligan of the University Chicago talks with EconTalk's Russ Roberts about the costs of delaying a vaccine, the hidden costs of FDA regulation, and what we learned and failed to learn about the Covid pandemic.