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?