From the Team Dashboard

You can instantly identify available and unavailable participants by looking at the Health column of the Wellness dashboard (red=unavailable due to health problem; yellow=available with limitations; green=available).

From the Group Charts

The Health Problems section automatically displays all the participants with health problems.

Availability Statistics

To generate a graph that displays the number of percent of available/unavailable participants over time, open Group Charts, select a period, and scroll down to the Availability section