An analysis of the vaccine by Pfizer and BionTech indicates that it is more than 90% effective against the transmission of the SarsCov-2 virus.
This news could provoke high expectations amid the existing social fatigue from a pandemic that has already claimed hundreds of thousands of lives.
But there are other laboratories that are at the same level of research to achieve immunity with a vaccine.
We asked Dr. José Gonzáles Zamora, from the University of Miami, what are the substantial differences between the covid-19 vaccines from the different laboratories.