You can’t have it both ways here. Are children meant to be instrumental in the “herd immunity” strategy or not? If they are then they will need to be carriers and spreaders of the virus in order for it to work. If closing schools poses a threat to grandparents delivering childcare then they must pose a risk to them and therefore have CV.. Now, quite mysteriously, you are saying there is no evidence children carry the virus and no evidence to say school staff are at risk. If so, they can’t pose a threat to their grandparents and would be quite useless in spreading it to immunise the population. The only justification left for not closing schools then is on economic one . Keeping adults in work to keep the economy going and providing childcare to healthcare workers. That appears to be all that remains of the argument as you present it. All these other countries who have closed schools have made it up have they that children get the virus and pass it on. Well? Seriously have they just made that all up? Why are you having a go at Catgirl for making a very reasonable assumption that the kids we teach may be infected already or about to be? I have had a few cases of kids presenting with both fever and coughs. Like everyone this could be routine viruses but as the days go on it is reasonable to assume it could be CV. Your view is that we wait and see, Chance it. At which point in this scenario would it be acceptable to you to close a school?