my son came to the US when he was 11 year old. He was born out of wedlock, but his name is in his birth certificate. The last time he saw his dad was when he was 6 years old. After 16 years of no communication, his dad found him on FB, they started talking and decided he wants to bring him here. His dad has now a family and has 2 kids. Is it possible to bring him here. Also, he has been diagnosed with hepa B.