Travelers to the United States who have been afflicted with a disease of public health significance, a mental disorder which is associated with a display of harmful behavior, or are a drug abuser or addict may be ineligible to receive a visa. If found ineligible, they will require a waiver of ineligibility in order to travel.

At the time you apply for a nonimmigrant visa you are required to furnish from a doctor, specialist and/or other professional person familiar with your case a letter that addresses the following:

• diagnosis and relevant medical history of the your condition;
• current state of health;
• the likelihood of a need for care or hospitalization during your stay in the United States;
• whether you, in the opinion of the doctor, are likely to remain in a stable condition during the trip, and are likely to cope with a strange environment; and
• details of any history of harmful behavior you have shown towards yourself, others, or property.

You are also required to complete and furnish a personal data form VCU1. (PDF)