Regarding the capacity of the Pfizer vaccine to block Covid variants

According to a study by the U.S. pharmaceutical giant, a coronavirus vaccine created by Pfizer and BioNTech appears to be effective against a crucial mutation in the more contagious variants of the virus found in the U.K. and South Africa. Dr. Scott Gottlieb, a former FDA commissioner and current member of the boards of Pfizer and the biotech company Illumina, joined "Squawk Box" on Friday to talk about the results.