I have almost accepted paper but a question by one of the reviewers is very confusing for me

I am asked to clarify if I have made single or double blind evaluation of my results.......
Well, I work with mice, infected with something.
I have one control group and several experimental groups, which were examined in different time-points during the infection.
These blind experiments I think are performed in clinical trials with humans - I know well what they are, but.......I make a basic research.
I think in fundamental research we don`t make blind experiments - do we?
Am I missing something?
Edited by Nephrite, 03 June 2013 - 06:01 AM.