A U.S. Senate committee met March 18 to review the federal government’s response to the COVID-19 pandemic, during which former FDA commissioner David Kessler said the Trump administration’s vaccine contracts were expensive, but effective in ensuring a robust supply. Nonetheless, Sen. Chris Murphy (D-Conn.) said one vaccine manufacturer had recently voiced an interest in charging more on a per-dose basis for its vaccine, and suggested that the cost of booster shots should perhaps be examined anew by the Biden administration.