agree one of the only ways to get this virus under control is to get more people vaccinated especially with the emergence of break-through cases in fully vaccinated individuals. it's rare for a break-through infection to lead to death or hospitalization, but those immunocompromised are at higher risk of illness or death. a group of advisers to the cdc are urging federal regulators to give additional doses to those with weakened immune systems to act as a booster shot of sorts. 5.6 million people in the united states live with weakened immune systems including individuals who have cancer, hiv or aids or are organ transplant recipients and those suffering from other autoimmune diseases. joining me is dr. rick bright, a former official with the health and human services and now with the pandemic prevention and