Why COVID Master Protocols Haven’t Been Productive in the U.S., and How to Fix ItNews Home - Why COVID Master Protocols Haven’t Been Productive in the U.S., and How to Fix It Posted on January 22, 2021July 9, 2021 by kristi.geercken@duke.edu Why COVID Master Protocols Haven’t Been Productive in the U.S., and How to Fix It Why COVID Master Protocols Haven’t Been Productive in the U.S., and How to Fix It