I’ve seen a lot today about how effective the vaccines are; mistakes aside, lots of folks seem to be mixing up which denominators matter - good thing statisticians LOVE denominators! If you see something like x% of the sick/hospitalized/deceased were vaccinated, the better the vaccine uptake the scarier this number will seem! It is using the wrong denominator. For example, here is a scenario with 90% vaccination, 4 people got sick: 2 vaccinated 2 unvaccinated: In this scenario, 50% of the s...
