Im not saying that it’s hard to close nursing homes. I am saying it’s going to be hard to keep COVID out of them, if no one else in society is changing their behavior in any way. If it were so easy to protect a particular group, we would not have had our president get COVID. If you want my opinion of schools, i’d probably say that yes in retrospect they didn’t turn out to be a hotbed of transmission. But I would qualify that in two ways: 1) this result was in conjunction with other measures and 2) is only obvious in hindsight. Last January people didn’t know what the heck they were up against. Trump thought there would be a handful of cases in the US total and even the CDC didn’t ask for travel limitations (that I can recall). The bottom line is that it’s tough to know in advance, and it’s not even automatic to know in hindsight, as we don’t usually have the counterfactuals against which to compare.