If you don't mind my asking, what is the autoimmune disease? I have one of my own and with my own worries for the same reason. Data based on China and a few other sources from the Imperial College Covid-19 response team for people below the age of 40, down to 30 shows that of this subset of confirmed infected, only 3.2% are likely to require hospitalization and even of those 2.3% only 5% are likely to require critical care. I assume that quite a few more than that among them have some complicating condition.