Pfizer, BioNTech Hit Milestone In COVID-19 Vaccine Progress

Pfizer and BioNTech announced that their COVID-19 vaccine was more than 90% effective amongst more than 43,000 patients. A milestone in the journey to an approved vaccine, the two companies still have more testing to do to meet Food and Drug Administration safety requirements.

Here & Now's Peter O'Dowd speaks with Dr. Joshua Sharfstein of Johns Hopkins about the announcement.