News USA TODAY panel says US has nailed the science behind COVID-19 vaccine, but logistics, trust remain a concern December 23, 2020 Karen Weintraub and Elizabeth Weise, USA TODAY Comments Off on USA TODAY panel says US has nailed the science behind COVID-19 vaccine, but logistics, trust remain a concern Experts are concerned some won't trust the COVID-19 vaccine and are wary of production problems that could delay getting it to millions of Americans.