3 rounds?? I got the original strain that went thru the US - I've only had it once. I just blood test done not too long ago and I still have measurable antibodi

3 rounds?? I got the original strain that went thru the US - I've only had it once. I just blood test done not too long ago and I still have measurable antibodies 3 years later, a low count - I'm due for a booster but I've never been vaccinated.