immune to hep b always immune

Hi! I’m new here. Back in 1980 my ex husband was diagnosed with Hep B. I also tested positive but never had the problems he had. A year later I was told I was immune to both the interior and exterior of the virus and could never get it again nor pass it to my kids da. Had 2 children since and never passed it on nor had any problems. Now I’m immigrating to Canada to be with my husband who I married last year and Canada is demanding both a grip b and hep c test. (My husband was cured of hep c last year)
Am I correct in believing once immune to hep b always immune and that hep c is rarely sexually transmitted?? My last blood work last year still showed immunity but I wanted to verify my assumption. I’m not a drinker and never in my life did any sort of drugs so I think all will be ok.... just want to hear what experts say. I’m anxious to move!!

Thank you!😊 I now anxiously await my landing date to finally join my husband.