You are using an older browser version. Please use a supported version for the best MSN experience.

Pending research on spread, variants could alter guidance for vaccinated people

CDC Director Dr. Rochelle Walensky discusses with Rachel Maddow why the new CDC guidance for vaccinated people is being characterized as "initial guidance" and what additional information is pending.

UP NEXT

UP NEXT

More From MSNBC

More From MSNBC

image beaconimage beaconimage beacon