Here's how Covid-19 antiviral pills from Pfizer and Merck and Ridgeback work, how effective they are, and how they might change the course of the pandemic.

PRODUCTION CREDITS:

Digital Producer:
Emily Zendt
Production Assistance:
David Condon, Christina Monnen

Additional Footage:
Edgeworx
National Institute of Allergy and Infectious Diseases
Merck
Pfizer
Christian C. Gruber Georg
Steinkellner/Wikimedia/CC by 4.0

Archival:
Storyblocks

Music:
APM

© WGBH Educational Foundation 2022