time to get vaccinated. we also know that vaccination helps protect you, your loved ones and your community from covid-19, and we fully anticipate this protection at least in part will be beneficial against omicron. >> meanwhile, here is some of that uncertainty i was talking about. fed chair jerome powell was on capitol hill today testifying about a heavy dose of economic uncertainty facing the country with omicron. moderna's ceo talked to the financial times about vaccine uncertainty, predicting that there will be a, quote, material drop in vaccine effectiveness. the question is how much. nevertheless, medical experts agree that the best way to go ahead -- to get ahead of omicron right now or any of the variants is getting every person possible vaccinated and/or boosted which puts white house messaging in the spotlight. ron klain responded on twitter to nbc's first read, disputing the notion that the white house was losing the messaging war on the vaccine mandate. even though less than half the