Pfizer research chief on early positive vaccine results

Pfizer chief scientific officer Dr. Mikael Dolsten joins "Squawk on the Street" to discuss the company's progress in developing a coronavirus vaccine. For access to live and exclusive video from CNBC subscribe to CNBC PRO: https://cnb.cx/2NGeIvi Pfizer shares jumped more than 3% Wednesday after it released positive results from its closely watched early-stage human trial of a coronavirus vaccine. The trial evaluated 45 people. Each participant received 10, 30 or 100 microgram doses of the vaccine or a placebo. The company said one of its four coronavirus vaccine candidates produced neutralizing antibodies, which researchers believe is necessary to build immunity to the virus, in all participants who received two of the 10 or 30 microgram doses after 28 days, according to the preliminary data. The findings were posted in a paper released on MedRXiv. The company said the levels of neutralizing antibodies were 1.8 to 2.8 times higher than in recovered Covid-19 patients. After 28 days, all participants in the two lower-dose groups had significant levels of binding antibodies, the company said. “We are encouraged by the clinical data of BNT162b1, one of four mRNA constructs we are evaluating clinically, and for which we have positive, preliminary, topline findings,” Kathrin Jansen, head of Pfizer’s vaccine research and development, said in a press release. “We are dedicated to develop potentially groundbreaking vaccines and medicines, and in the face of this global health crisis, we approach this goal with the utmost urgency.” » Subscribe to CNBC TV: https://cnb.cx/SubscribeCNBCtelevision » Subscribe to CNBC: https://cnb.cx/SubscribeCNBC » Subscribe to CNBC Classic: https://cnb.cx/SubscribeCNBCclassic Turn to CNBC TV for the latest stock market news and analysis. From market futures to live price updates CNBC is the leader in business news worldwide. Connect with CNBC News Online Get the latest news: http://www.cnbc.com/ Follow CNBC on LinkedIn: https://cnb.cx/LinkedInCNBC Follow CNBC News on Facebook: Follow CNBC News on Twitter: https://cnb.cx/FollowCNBC Follow CNBC News on Instagram: https://cnb.cx/InstagramCNBC #CNBC #CNBCTV