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.
Fuente: Youtube
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.
Fuente: Youtube
