67,000 coronavirus cases every day, that s up more than 50% in the last seven days alone, fueled by the delta variant. new cdc research shedding light on how much more contagious this more transmissible strain is. although the spread is driven by people who have not been vaccinated, that s the majority of driver, vaccinated people infected with coronavirus can be contagious as well. bottom line, vaccinations save lives, masks can go a long way toward helping keep people safe. we have a team of experts here to discuss this. dr. esther chu, jessica rivera, science communication lead for covid-19 tracking project, and dr. el-sayed. thank you to you all as we sort through this. i want to talk first about the cdc released a lot of new