From an outsider's perspective (that is, I'm not American) the WHO have done a fantastic job so far. They really haven't put a foot wrong. It is NOT their responsibility to put plans into action, only to advise countries on what they should do. Which is what they did, with plenty of warning. <modsnip>
Unrelated to that, in countries that are further along the curve, schools do seem to be some of the first things reopening. In Denmark, children under 11 are returning to school first to lessen the burden on families with key workers (preventing the need for grandparents to provide childcare and put themselves in danger).
The results of a large scale randomised antibody test in Heinsberg were released and were very interesting but the article is both behind a paywall and entirely in German so it's not much use linking here.
I'm a key worker and bought my stepmum some flowers for Easter. She hugged me, and I wondered if maybe she shouldn't have. We live together (along with my dad) but I go to work and interact with many members of the public every day, she and my dad are both in their mid-70s and don't go out except once a day for a walk and once a week to shop. How sad the world we live in is right now, that I have to wonder if I can hug the people I live with...