preventing people from getting sick. that's why the majority have mild illness. also we still have the same problem that i think you and i have been talking about for two years now. there's not enough testing happening. we don't know the true denominator here. when deal with something as transmissible as omicron. there could be people who have it and have mild sympt omps and aren't getting tested. it's hard to say how protective the vaccines are against infection. but we do know they seem very protective against illness. >> such a key pom component, th testing or lack thereof in terms of being accessible for everyday americans. about 50 million people, about 27% of fully vaccinated adults have received a booster. what percent of those vaccinated need to get their booster so omicron stays under control? >> that's a really important question, and we, you know, you hate to be the person that says