WILLIAM J. BROAD reports in The New York Times that the federal government is planning mass smallpox vaccinations. This seems like a good idea to me, far superior to the lame vaccinate-just-a-few plan floated a couple of months back. It suggests that either (1) there’s clearer thinking at the top all of a sudden; or (2) the risk of a smallpox attack now seems higher than it did. The former is good news; the latter is not so good.