Should I write an addendum in this case?

[yhchoi1687]

In last May, I got a meningitis during final exam/paper period, so I couldn't work well on my final research papers in two classes, which had the final deadlines in late May.
For those two classes, I received B and B- while all other grades in my transcript are mostly A and A+ with a couple B+.
I don't want to get an unnecessary negative attention because these grades are not terribly bad, but I am bit worried because one of them is a senior capstone research course.
So I just want to hear about your opinions if I should write a short addendum in this case.

[guynourmin]

No