19/ Sports: Many pairs/trios of cases on teams on same days. Haven't made a fancy graph, but here are cases by sport. Many sports teams had case clusters. (Et tu H-B ultimate frisbee?)

Biggest clusters:
#WashingtonLiberty boy's basketball (Dec. superspreader)
#Wakefield football

Coaches can instill in players concern for others, a "take care of our team health" mentality; ask sick kids to stay home/get tested.

"Play healthy" should be a policy push.

5/ We looked at both buildings & programs. Buildings w/most cases:
#Wakefield
#Yorktown
#WashingtonLiberty
#Williamsburg
#Gunston
#Discovery (newer bldg)
#ArlingtonTraditional
#Cardinal (new)

6 of 8 in affluent N. Arlington; Wakefield had a super-spreader event (prom) that led to a particularly massive outbreak, where Yorktown’s overall amount of COVID spread over weeks after masks became optional was higher.

3 had $$ HVAC work that failed to get rooms up to code; code is also inadequate!