Facing a post-Thanksgiving surge of COVID-19 cases, the Centers for Disease Control and Prevention (CDC) today released new options for shorter quarantine periods and urged Americans not to travel for the upcoming holidays, though it also unveiled new tools for doing so safely—both with and without testing.Shortened quarantine periodAt a media telebriefing today, CDC officials first detailed the new quarantine guidance, which they said has evolved as experts learn more research and modeling data.Henry Walke, MD, the CDC's COVID-19 incident manager, said though the 14-day quarantine period after exposure to COVID-19 is still ideal, the CDC now recommends two acceptable periods: 10 days without a test if the person in quarantine has no