History of Vaccines: What This Means For Coronavirus

Bill Petro
6 min readNov 20, 2020

Today, Pfizer and BioNTech announced that they are submitting their Coronavirus vaccine to the Food and Drug Administration for Emergency Use Approval.

What are vaccines, when were they first developed, and what is the road to an approved vaccine in today’s world?

You may have noticed that the “vaca” in the word vaccine sounds like “cow.” The word…

Bill Petro

Writer, technologist, historian. Former Silicon Valley tech exec. Author of fascinating articles on history, tech, pop culture, & travel. https://billpetro.com