Source: http://americanlaw.com/exclude2.html
Timestamp: 2019-04-26 07:55:56+00:00

Document:
Under INA §212(a)(1)(A)(i), an alien who is determined (in accordance with regulations prescribed by the Secretary of Health and Human Services) to have a communicable disease of public health significance, which shall include infection with the etiologic agent for acquired immune deficiency syndrome, is inadmissible. The Department of Health and Human Services regulations at 42 CFR §34.2(b) define the term"communicable disease of public health significance" as including: (a) chancroid; (b) gonorrhea; (c) granuloma inguinale; (d) human immunodeficiency virus (HIV) infection; (e) leprosy, infectious; (f) lymphogranuloma venereum; (g) syphilis, infectious stage; and (h) tuberculosis, active.
Under INA §212(g)(1), a waiver is available for this ground of exclusion if the alien is the spouse or unmarried son or daughter or the minor unmarried and lawfully adopted child of a United States citizen, an alien lawfully admitted for permanent residence or an alien who has been issued an immigrant visa.
under such circumstances as the Attorney General provides by regulation, with respect to whom the requirement of such a vaccination would be contrary to the alien's religious beliefs or moral convictions.
Is seeking an immigrant visa as an immediate relative, if, prior to the admission of the child, an adoptive parent or prospective adoptive parent of the child, who has sponsored the child for admission as an immediate relative, has executed an affidavit stating that the parent is aware of the provisions of subparagraph (A)(ii) and will ensure that, within 30 days of the child's admission, or at the earliest time that is medically appropriate, the child will receive the vaccinations identified in such subparagraph.
to have had a physical or mental disorder and a history or behavior associated with the disorder that may pose or has posed a threat to the property, safety or welfare of the alien or others and which behavior is likely to recur or lead to other harmful behavior.
A waiver of this ground is available under INA §212(g)(3) [formerly INA §212(g)(2)] subject to any terms, conditions and controls, if any, imposed by the Attorney General in his discretion.
While alcoholism constitutes a medical condition, this ground does not explicitly refer to alcoholics or alcoholism. An alcoholic is not excludable unless there is a current or past history of harmful behavior associated with the disorder which has posed or is likely to pose a threat to the property, safety or welfare of the alien or others. A conviction for driving while impaired has been interpreted as constituting evidence of a medical disorder and associated harmful behavior.
Under INA §212(a)(1)(A)(iv) [formerly INA §212(a)(1)(A)(iii)] a person who is determined in accordance with the regulations of the Secretary of Health and Human Services to be a drug abuser or drug addict is excludable. Drug abuse is defined as the non-medical use of a substance listed in §202 of the Controlled Substances Act even if the use has not resulted in physical or psychological dependence.

References: §212
 §34
 §212
 §212
 §212
 §212
 §212
 §202