u.c. berkley official live with us to share about how they're minimizing transmission risk as the university returns to in-person learning with students moving in this week. first, major covid news with vaccine boosters and regeneron heaines. president n affirmed the c.d.c.'s announcement this morning that americans should plan to get a booster eight months after their second shot. joining us now to break this down is stanford microbiology and immunology professor dr. robert segal. thank you for your time today. >> thank you for in inviting me back. kristen: the white house announced its plan making booster shots available starting september 20. you're eligible to get yours eight months after the second dose. we are waiting for the f.d.a. and the c.d.c. to sign off on that but what do you think about this plan? >> i think it's a good plan. i think that this is putting into play sort of proactively the need for boosters. kristen: dr. anthony fauci shared slides this morning with data to support this conclusion, that boosters are a good idea. tell us the main points he made. >> i'm sorry, i di