States expand vaccination efforts as COVID-19 deaths keep rising

The U.S. is moving onto its next phase of coronavirus vaccinations, with major expansions to immunization sites at stadiums and convention centers. The efforts come as the country's seven-day average of COVID-19 deaths now stands at over 3,000 a day. Dr. Dyan Hes, founder of Gramercy Pediatrics, joined CBSN to discuss the latest on vaccinations and what we are learning from new studies on immunity and traveling during a pandemic.