Pfizer’s vaccine appears to neutralize the Covid variants found in the U.K. and South Africa. The study was conducted by Pfizer and has not been peer reviewed. It comes as countries scramble to deal with more contagious variants of the…

NBC News correspondent Steve Patterson reports on the hard-hit California health-care system, which now has to contend with a new highly infectious strain of Covid-19. For access to live and exclusive video from CNBC subscribe to CNBC PRO: California health…

CNBC’s “Closing Bell” team reports on President-elect Joe Biden receiving his first dose of Pfizer’s coronavirus vaccine. For access to live and exclusive video from CNBC subscribe to CNBC PRO: President-elect Joe Biden received a Covid-19 vaccine on live television…