Live

Watch CBSN Live

How Colin Powell's cancer may have limited COVID vaccine's effectiveness

Colin Powell died from COVID-19 complications despite being vaccinated. Dr. Megan Ranney, an emergency room doctor at Brown University, explains how his age and cancer may have weakened his immune system and the vaccine's effectiveness.
View CBS News In
CBS News App Open
Chrome Safari Continue
Be the first to know
Get browser notifications for breaking news, live events, and exclusive reporting.