Over 7,000 student and exchange visitors from India overstayed in the US in 2023, an expert told US lawmakers and suggested several reforms in the country's immigration policies, including those related to H-1B visas. As many as 32 countries have student/exchange visitor overstay rates of higher than 20 per cent, Jessica M Vaughan from the Center for Immigration Studies told the US House Committee on the Judiciary during a hearing on Restoring Immigration Enforcement in America. The F and M visa categories have the highest overstay rates of any of the broad categories of temporary admission. The F-1 Visa allows a person to enter the United States as a full-time student at an accredited college, university, seminary, conservatory, academic high school, elementary school, or other academic institution or in a language training programme. The M-1 visa category includes students in vocational or other nonacademic programmes, other than language training. Four countries -- Brazil, Chin