For hundreds of thousands of people every year who dream of studying or researching in the United States, a student visa is the golden ticket.

Seven more Harvard affiliates — including four current students and three recent graduates — have had their student visas revoked, bringing the total number of affected affiliates to twelve, according to a Thursday email from the Harvard International Office.

Students and other community members at UMass Amherst, UMass Boston, and Harvard University had their visas revoked, school leaders said.