but the mistake people would make is to say, let me wait and see if we get one. if you're eligible to get boosted, get boosted right now. >> reporter: there is screening in place for international travel but we've seen how quickly variants can spread once they reach our shores. does the science not suggest there should at minimum be a testing requirement for domestic air travel? and if not, why not? >> again, these kind of things we always talk about and consider. but right now, i'm not so sure we need a testing for air travel in this country. i always get back to the fact that people should wind up getting vaccinated and boosted if they're eligible for a boost. i keep coming back to that because that's really the solution to this problem. >> reporter: two quick ones. a moderna executive has said in the past couple of days that this variant appears threatening and may demand new vaccines. what do you make of those remarks that seem a lot more alarmist than the