Doctor says COVID-19 herd immunity still long way off as U.S. prepares for vaccine distribution

The first doses of a coronavirus vaccine could be distributed as early as mid-December, as hospitals struggle to cope with a growing surge in patients with COVID-19. CBS News correspondent David Begnaud reports on the toll the pandemic is taking on frontline workers, and Dr. Dyan Hes, founder of Gramercy Pediatrics, joined CBSN to discuss which groups should be prioritized when vaccines are distributed, and how long it might take to reach herd immunity.