Covid-19 vaccines have reached consumers in record time—vaccine development can take 10 to 15 years, but the U.S. Food and Drug Administration has granted emergency authorization to vaccines made by Pfizer-BioNTech and Moderna in less than a year.

Covid-19 vaccines have reached consumers in record time—vaccine development can take 10 to 15 years, but the U.S. Food and Drug Administration has granted emergency authorization to vaccines made by Pfizer-BioNTech...

"I'm fairly certain I got the vax and not the placebo."

"I'm fairly certain I got the vax and not the placebo."

On Monday, Pfizer announced that early analysis of the coronavirus vaccine it has been developing with BioNTech suggested the vaccine was a success. A promising development considering the pandemic has already killed roughly 1.3 million people.

On Monday, Pfizer announced that early analysis of the coronavirus vaccine it has been developing with BioNTech suggested the vaccine was a success. A promising development considering the pandemic has already...