Hepatitis B immunity Status

Hello everyone.

I’m a 33yo African male. At the beginning of October 2025, I had by first viral hepatitis panel. I discovered I had a resolved hepatitis B with immunity of 98 mUI/ml. What prompted me to get the test was recurrent hitching which began as a sudden case of hives some 12 months back.

However, I did another panel few days ago and the result is 24 UI/ml. The interval is roughly 6 months and the immunity value has reduced over 70%.

1. Is it likely that my primary infection was the outbreak of hives 12 months back? Considering at that time my lft was fairly normal with only mildly elevated bilirubin of 21.

2. Will this degrade further and I loose the natural immunity?

3. Do I need to get vaccinated to boost the immunity?