When you recover from a virus, antibodies are in your body. These can be detected, Once you're recovered, you can no longer spread the disease. Problem is, people with mild symptoms believe they don't have it, or have recovered.

I'm one of the many, many people who has been ill for a while during the past weeks, and would like to know if I had it. If I can know for sure that I had it, and no longer have it, then I can "move on with my life" indeed. As in, I no longer have to worry about getting this disease, spreading this disease, or getting organ damage from this disease. Most important, I'll know that when I visit my mother (nearly 70, and risk group) that I won't spread the disease to her. Same for my mother in law.