A6. Big problems for global herd immunity—even if US reaches wide coverage, b/c vaccines being hoarded by rich countries much of the world won’t. 70 countries will only be able to vaccinate 1 in 10 people this year. Without change this means continuing pandemic #AskReutershttps://t.co/b0MPtZokZVhttps://t.co/tabj5bF7zC