william moss, executive director of the international vaccine access center at johns hopkins.n some countries, israel is considering a fourth booster, but a group of scientists has recently said you don't need a booster at all in a lot of cases. we will cover that next. matt: this is bloomberg markets. i am matt miller. an all-star panel of scientists say coronavirus vaccines work so well most people don't need a booster at all. the authors of a medical journal review say governments would be better served immunizing the unvaccinated. here to discuss is the executive director of the international vaccine access center at johns hopkins. dr. william maas, to me, these are two different issues, how well vaccines work, whether boosters would be a good thing, and whether it's better to use resources on the unvaccinated. are we may be doing a dense -- doing a disservice to conflate these issues? >> the number 1, 2 and three priorities for us in the united states and globally is to get vaccines to the unvaccinated. that is what we need to concentrate on here, and that is what we need