I have been battling Lyme for about two years now. I know 2 or 3 people who have beaten this disease with no recurrence or remaining symptoms. I also know 2 or 3 who had relapses because they pushed too hard and didn't continue healthy life style after feeling better.
This is a tough question to answer.
Maybe your hubby can try treatment again, just to see if he gets a reaction? If he does, then you know he didn't kill all the bacteria the first time around.
Peace and health and welcome to you.