1. If you don't know whether your husband is infected with HIV or not, and your husband has a history of drug abuse, it is indeed possible to be infected with HIV, but it is unlikely. Even if the husband is HIV-positive, not 100% infected his wife through sexual intercourse.
2. Even if this lady has been confirmed to be infected with HIV, her child is not 100% infected with HIV, and the probability of HIV transmission through her mother is 30%~40%. Moreover, if the mother is blocked in advance, even if the lady is HIV-positive, her child is 99% healthy.
This question should be answered from two aspects.
(1) This child should have it, because with the current technology, even if we most pessimistically think that her husband is infected and passed it on to this lady, this child can still be healthy.
(2) If both parents are infected with HIV, then the child should not, because although the child is healthy, his parents will die of HIV when the child is about 13 years old (estimated by current technology), so that the child becomes an orphan and will receive many strange eyes, and HIV is definitely despised in the eyes of China people, which is unfair and unhappy for the child.
Finally, my suggestion is: let this lady's husband go to the local CDC or 3A hospital for HIV antibody testing. If it is negative, then the family can continue to live a normal life, and this lady does not need to be tested. If it is positive, then the woman should also be tested for HIV antibody. If this woman is negative, then the child can still be born. But in the future, we should pay special attention to the use of condoms in our sexual life with our husbands, which may lead to infection. Please go to the local CDC for risk assessment and antiviral treatment within 24 hours. If it's Yang, I suggest the couple not to have this child because of what I said above.
This is my analysis, answer and suggestion on this question. I hope you can adopt it. If you have any questions, please keep asking questions.