Even if there is evidence to support the view that kids are not spreaders of the virus (I’m not convinced at all) you fail to appreciate that when a primary school opens in walks a whole host of adults. Parents bring kids to school and collect them. Whole staff (not just teachers) will come from different households where they live with other adults who also maybe going back to work alongside other adults etc. At the moment “emergency school” for key workers limits the numbers of adults and children coming in, precisely to minimise adult to adult exposure in addition to child to adult. You are clearly someone who has never worked in a primary school and have no clue about how they operate. I believe I got it from kids in my class who returned from China with persistent coughs end of January. I had all the main symptoms and even posted about this on the old Coronavirus thread (now locked). My young teenage son became ill not long after me with cough, temperature and had this unusual reaction in the form of an extreme “measles type” rash which lasted for 2 months! Of course I cannot ever know for sure. Maybe we just had another virus and it was nothing to do with the kids who flew back from China. Adults do get all sorts from kids. We know this. I simply do not believe that with all this virus about kids, whose hygiene is never that good, mysteriously don’t spread this one. We know kids have had it. There are concerns about some extreme reactions to it in children. I do think most children have it less severely in most cases and I do believe many are asymptomatic. They data needed just isn’t there yet. It’s too soon for such assumptions. What this Swiss Prof is basing his theories on I do not know. School will have to re-open in a staggered way, even primaries and to do so we need small numbers. It is the only way. Personally, I think this is a long way off. Numbers of deaths are not falling low or quickly enough. We are not Far enough down from the peak and I doubt we will be for weeks yet. Personally I think we are looking at some trial openings in June/July at the earliest. Very possibly this will not be until September.