As of July 1, 2008, females aged 11-26 years seeking status as permanent residents in the United States must produce documentation that they have received the human papillomavirus vaccine before the U.S. Citizenship and Immigration Services will approve their status adjustment. Immigration rights activists and public health officials have objected to this new requirement on the grounds that it is unnecessary and imposes unreasonable barriers to lawful immigration due to its expense. The Supreme Court has generally upheld mandatory vaccination requirements (...) for citizens and non-citizens and has tolerated federal immigration regulations that would be unconstitutional if applied to citizens. However, the HPV vaccination requirement may be arbitrary, unnecessary, and discriminatory as applied to green card applicants who pose no greater threat to public health than citizens who are not subject to the same requirements. Furthermore, the requirement may also impose unreasonable restraints on aliens individual liberties as well as real barriers to immigration. (shrink)