Ok....if you have none, you acknowledge that then make a statement which might reflect how that might impact you as a student. Do you have any responsibility as a fellow student to others who might have a disability?
What if your lab partner was color blind & couldn't see the color change in a pharmaceutical experiment? What if your lab partner was missing a hand & had difficulty with dissection in anatomy? All these are extreme examples, but ones to think about which might allow you to develop empathy for patients and coworkers who might have a disability.
You don't need to write a dissertation.....just make a comment acknowledging that you are aware of how they could impact the educational environment & how you could be a positive force for that environment.
Just a suggestion....