No they won’t be closed until 2022 for several reasons
1- there will more than likely be a vaccination by then.
2- most people will have had it in some form anyway by then
2 it would kill the economy off. Not just put it in to recession, but literally the system would collapse in every which way and the affects would be felt for decades thereafter.
4- whilst it’s a serious disease and we need to be vigilant, I believe the true figures of those who have had it will be much higher than what is know currently. Subsequently the death rate will be lower and it won’t be deemed as serious as it is currently.
Of course that’s all in hindsight in a year or two but I do believe that’s what will happen.
I think schools will be back in September at the latest and quite probably mid June