There Are Many Unanswered Questions About Pfizer’s Vaccine | The 11th Hour | MSNBC

56

Award-winning science journalist Laurie Garrett reacts to the news that Pfizer says early data shows its Covid-19 vaccine has over 90% efficacy, but she notes there are still many unanswered questions. Aired on 11/09/2020.
» Subscribe to MSNBC:…