U.S. races to roll out COVID-19 vaccine as concerns grow over new variants

The race to vaccinate people against COVID-19 has been made even more urgent by the emergency of new, more contagious variants of the coronavirus. Dr. Teresa Amato, the chair of emergency medicine at Long Island Jewish Hospital in Queens, New York, joins CBSN to discuss whether existing vaccines will be effective against more worrying new strains of the virus.