Yesterday I did a blood test after my doctor's visit and today I got the results back. Everything is fine and within normal ranges, except the leukocyte count - it's 3.3 while the normal range starts at 4. Can this be bad? Sadly, I can't reach my doctor since it's Friday.


On my previous blood test from 2 years ago, my leukocyte level was 3.6, which is a bit higher, but still below normal. Two years before that, it was about 5, which is normal. I was worried about the drop back then, but my doctor wrote it off as fluctuations that tend to happen.


What could be the causes? Should I treat this seriously?