You should see Jill Biden's PhD dissertation. I would have failed it as a master's thesis. Then, my boss would change the grade to a passing grade "to be fair" because it "impinges on personal expression and causes lasting psychological harm to brand a student a failure".
So in conclusion can we say that out of the control villages (n = 146,783) there were 3,380 serum positive cases (distilled down from reported symptoms, agree to test, tested. tested positive) and out of the intervention villages (n= 160,323) same distillation leaving 3,804 serum positive cases.
If the villager didn't report symptoms s/he was deemed to not have covid.