Can we really get better Covid vaccines? There are big hurdles, but some hope

On Tuesday, White House officials gathered scientists, pharmaceutical executives, and experts in public health at a summit to try to lay out a path toward creating better vaccines. What was the upshot? For starters, there was tremendous optimism about the prospects for developing next-generation vaccines. And there were, in fact, glimmers of a tractable path to better products — if Congress will provide billions of dollars to speed things up.