Former FDA chief Scott Gottlieb on Pfizer vaccine's ability to neutralize Covid variants

A coronavirus vaccine developed by Pfizer and BioNTech appears to be effective against a key mutation in the more infectious variants of the virus discovered in the U.K. and South Africa, according to a study conducted by the U.S. pharmaceutical giant. Dr. Scott Gottlieb, member of the boards of Pfizer and biotech company Illumina and former FDA commissioner, joined "Squawk Box" on Friday to discuss the findings.