Final answer:
Foreign nationals applying for a green card are required to receive vaccinations under U.S. immigration law. Student visa, tourist visa, and asylum seekers are not bound by this requirement, although policies can vary with public health concerns. Vaccination is a step in the medical examination during the green card application process.
Step-by-step explanation:
Under current U.S. immigration law, foreign nationals who apply to possess a green card are required to receive vaccinations. This is part of the adjustment of status process, where individuals must adhere to certain medical requirements, including vaccinations, to ensure public health safety. Green card applicants undergo a medical examination which includes receiving the necessary vaccines. Those seeking a Student Visa (F-1), Tourist Visa (B-2), or Asylum are not necessarily required by law to have vaccinations, although the health regulations may vary based on current health concerns and policies at the time of application. Additionally, becoming a lawful permanent resident or green card holder is a critical step for those pursuing the multi-step naturalization process to become U.S. citizens.