if there are huge swaths of the country and the world not vaccinated. so how are we going to handle this? are you going to anticipate we're going to need vaccines and boosters, a regular routine we all get every six months or so? >> shift right now in thinking has to be from you know how we are going to get past the surge to get beyond the virus and how we are going to live with the virus for the long-term. that's where we are. the answer primarily is vaccination. in our country and our developing world, vaccination rates are going reasonable well. when there are country's vaccination rate is under 10%, you can see it continues to mutate. more people in our country will get boosters right now, we are