Travel history among persons infected with SARS-CoV-2 variants of concern in the United States, December 2020-February 2021 by Alicia Dunajcik, Kambria Haire, Jennifer D. Thomas, Leah F. Moriarty, Yuri Springer, Julie M. Villanueva, Adam MacNeil, Benjamin Silk, Jeffrey B. Nemhauser, Ramona Byrkit, Melanie Taylor, Krista Queen, Suxiang Tong, Justin Lee, Dhwani Batra, Clinton Paden, Tiffany Henderson, Audrey Kunkes, Mojisola Ojo, Melanie Firestone, Lindsey Martin Webb, Melissa Freeland, Catherine M. Brown, Thelonious Williams, Krisandra Allen, Judy Kauerauf, Erica Wilson, Seema Jain, Eric McDonald, Elana Silver, Sarah Stous, Debra Wadford, Rachel Radcliffe, Chandra Marriott, Jennifer P. Owes, Stephen M. Bart, Lynn E. Sosa, Kelly Oakeson, Natalie Wodniak, Julia Shaffner, Quanta Brown, Ryan Westergaard, Andrea Salinas, Sara Hallyburton, Yasmin Ogale, Tabatha Offutt-Powell, Kimberly Bonner, Sheri Tubach, Clay Van Houten, Victoria Hughes, Valerie Reeb, Chris Galeazzi, Shreya Khuntia, Sasha McGee, Joseph T. Hicks, Dimple Dinesh Patel, Anna Krueger, Scott Hughes, Fabiana Jeanty, Jade C. Wang, Ellen H. Lee, Tracey Assanah-Deane, Megan Tompkins, Kendra Dougherty, Ozair Naqvi, Matthew Donahue, Justin Frederick, Baha Abdalhamid, Ann M. Powers, Mark Anderson