Nation USA TODAY vaccine panel says the US has nailed the science behind the COVID vaccine. Next up: logistics and trust. December 23, 2020December 23, 2020Karen Weintraub and Elizabeth Weise, USA TODAYComments Off on USA TODAY vaccine panel says the US has nailed the science behind the COVID vaccine. Next up: logistics and trust. Experts are concerned some won't trust the COVID vaccine and are wary of production problems that could delay getting it to millions of Americans.