On the menu today: The Omicron wave is just about done, with new cases now down 80 percent from the early January peak. But judging from masking- and vaccination-policy decisions from Washington, D.C., to New York City to Canada, you would think the Omicron variant was still raging out of control; the CDC’s data reveal that the Delta variant hasn’t been seen in weeks; and Fairfax County Public Schools have to start the clock on the countdown to allowing students to go maskless, as the county has passed the threshold for “moderate community transmission.”