ultimately upheld. tennessee governor bill lee was handed a second blow this week to his controversial order allowing parents to opt out of school mask requirements, amid the spiking case numbers in that state. a federal judge blocked the rule from being implemented while the legal battle moves its way through the courts. and a new phase in the vaccination drive now under way as the cdc endorses pfizer booster shots for adults 65 and older and for those people with underlying health conditions. frontline workers are also eligible for a booster six months after their last shot. now let's bring in dr. chris, public health physician and an american college of preventive medicine fellow. doctor, thank you so much for joining me. as we look at cdc director rochelle walensky, who overruled her advisors to include adults 18 and older who work in the high-risk environments to be eligible for the booster shot, do you think that caused more confusion to the rollout process and what kind of concerns do you have as a larger pool of people now are going to be eligible for the boosters?