This is what worries me most about catching the virus, I think I would be very unlucky to die from it (being quite fit and healthy for my age) but I do fear long term or irreparable damage to organs somehow. My twilight years would be little fun with a heart or lungs that only functioned 50% (for instance).
I do fear that the "death numbers" may only be the tip of the iceberg when it comes to damage done.