1.4M views · 10K reactions | The mRNA Covid-19 vaccines from Pfizer and Moderna will likely need a third dose as part of a full vaccine regimen, Dr. Anthony Fauci told CNN. "It isn’t as if the two doses of a vaccine are failing, it’s that the proper regimen will very likely ... be that three doses is really what you should be getting of an mRNA [vaccine]," he said. https://cnn.it/2X19P8u | CNN | Facebook