As we experience sorrow, we feel justified in giving others sorrow. And even if we are not giving sorrow to the one who gave us sorrow we are still giving sorrow to others.
Simply by the number of times we speak of that sorrow to others and wallow in it, we are giving sorrow to those around us who care for our welfare and only wish for our happiness. They are affected because they have heard the story of sorrow, and their attachment to us makes that sorrow stick to them in some way. Their vision and interaction with that other person will now change, because of us, maybe they had no personal issue with this person themselves, but now this virus has started to spread. Is this not how conflict and wars begin given enough time and energy?