11-month résumé gap, advice?

My résumé shows a gap from a layoff and some health issues. I have read a lot of threads here and could not find my exact situation. I have done some volunteering and a course during that time.

Thanks for writing this out. I went through something close to it 11 months ago, and it settled down once I kept a simple log of every call and form.

I listed the volunteering and course under the same dates and kept the explanation to a sentence in the cover letter.