Dr. Scott Gottlieb: We don’t have herd immunity, but there’s a reduction in the transfer of infection

Dr. Scott Gottlieb, former FDA commissioner, says potential reasons why coronavirus cases are declining in the U.S. is reduced activity and better adherence to wearing masks. He says we're not yet at herd immunity, but this will happen gradually over time. He joins 'Closing Bell' to discuss.
Fri, Feb 5 20215:09 PM EST