For more than 70 years, the "Open Doors Report on International Educational Exchange" has provided critical insight into students' and scholars' academic mobility patterns. In 2021, the need for comprehensive data is as vital as ever, allowing a better understanding of historical mobility flows into the United States while analyzing the effects of external shocks, especially the COVID-19 health pandemic. This "Open Doors" report provides an important baseline of the numbers before the pandemic. The analysis at the front of the book and the accompanying data tables featuring information on international students and scholars, U.S. study abroad, and intensive English programs showcase the robust level of international exchange in the United States before the COVID-19 pandemic. The findings also highlight that the 2019/20 decline in international students, the first in more than 15 years, varied significantly by institutional profiles. U.S. study abroad continued to increase in 2018/19 across all academic levels, which underscores the strong student interest and institutional support for studying abroad. This year's intensive English program analysis illustrates the unique profile of students in the leading states.