I was told that my son must be a sub user

Hi, I think that my son got hepatitis while he was on heroin, because he was sub user and didn’t get the original drug. He probably used heroin mixed with flour, and I suppose it was also contaminated with Hepatitis virus. Addicts are at great risk for developing all contagious diseases. Now, he is on methadone, and I am praying to God to give him strength to go through this. I was completely out of myself, when I found out that my child is taking drugs. I always believed that it is happening to some bad guys, but I guess it can happen to anyone.