the.com/prevalence
How much of a thing is going around right now, counted, not vibed.
means The proportion of a population that has a condition at a given time, existing cases and all.
from From Latin praevalere, to be stronger or have greater power — prevalence is what wins by sheer numbers, not virtue.
Not incidencePrevalence counts all cases; incidence counts only new ones.
Time mattersPoint prevalence is now; period prevalence spans a stretch.
Math twistRoughly incidence times duration; long illnesses pile up.