Case one
Eeh I had a case like yours, David, but the problem I had to solve was different. I had a blind student in class and she liked sitting in class in front, just opposite my teaching space. Fortunately, there was no COVID and no social distancing then. She would start typing with her braille machine the moment i open my mouth and the noise would exclude everybody else in a class of 300 students. So it was only her and me. I noticed others getting very irritated. After class i went to her and explained to her that it was very good she enjoyed the class and congratulated her because she was participating well. I asked her whether she had noticed that others were getting disturbed, she agreed and she said she was sorry. She suggested that she could be sitting at the corner of the hall with her friends who were comfortable with her braille noise. The problem was sorted and we all enjoyed our lessons.
Case 2
My good student was hit by a motor bike just as the class was about to sit an exam. the girl came to class with her bandaged hand; she could not write. I read questions for her. She answered orally and i wrote what she said verbatim. I could ask her to spell words she pronounced different. She passed with an average grade and proceeded to next class.