I would need to see what the measured parameters were. If it was just whether or not people came down with COVID during the measurement period then the length o

I would need to see what the measured parameters were. If it was just whether or not people came down with COVID during the measurement period then the length of the period obviously matters. Stretching out when people are sick is typically a lot better than having everyone sick at once. This is true for the populace at large, but is also true for smaller subsets of the populace. I recall an anecdote from a person who said they worked at a small firm where almost everyone was anti-mask except them. During the winter 21/22 Omicron wave basically everyone except them came down with COVID at once leaving that one person to hold everything together for a week.