Section 212 of the Immigration and Nationality Act bars US admission to foreign nationals diagnosed with certain illnesses. The Department of Health and Human Services (HHS), Center for Disease Control and Prevention (CDC)
published a final rule on Nov. 2, 2009 removing Human Immunodeficiency Virus (HIV) infection( commonly known as AIDS) from the list of illnesses that make a foreign national inadmissible. This rule takes effect on Jan 4, 2010.
Please visit the USCIS link given below to read answers to some of the frequently asked questions on this issue: