How can EB-5 investors with hepatitis B enter the U.S.?

Consider medical treatment first. The withdrawal should be the last resort if the medical treatment, unfortunately, failed. Good luck.

You should check with the civil surgeon in your home country to see if there is a treatment protocol they can sign off on.

Hepatitis B is not currently listed as a Class A communicable disease. See https://www.uscis.gov/policy-manual/volume-8-part-b-chapter-6 Presently only applicants who have communicable diseases of public health significance are inadmissible. With new rules coming all the time, it could become an issue if it impacts your ability to support yourself. So discuss it with your immigration counsel.

Hepatitis B is not included in the list of communicable diseases of public health significance such as Active TB, infectious syphilis, gonorrhea, infectious leprosy, HIV, etc. Thus it would not bar immigration benefits as stated in the federal regulation.

At the time of your immigrant visa interview, you must take and submit the results of your medical examination. If you are found to be excludable, you can recoup your investment based on the terms and conditions of your agreement and PPM.

Health-related grounds of inadmissibility are addressed in the Policy manual here: https://www.uscis.gov/policy-manual/volume-8-part-b.