The first vaccines were distributed 6 weeks ago. Â Although some attributed the decrease in cases even back in December to the vaccine, it was clearly too early. Â Now, vaccinations may well be affecting the spread of COVID. Â Moderna indicated their vaccine provided 95% protection at 14 days after the first shot. Â One study suggested that in South Africa, the Pfizer vaccine provided 90% protection 3 weeks after the first shot (ie, at the time of the 2nd shot in the US).

I noticed an apparent negative correlation between the number of people with at least one vaccination and the prevalence of COVID per capita. Â Visually:

However, when I calculated the correlation between the percentage of the total population with at least one vaccine to the cases in the last 7 days per 100K population, the result was just -0.13 and the pairs in a graph are

So, there may be a slight correlation, but it isn't obvious from this data.

I noticed an apparent negative correlation between the number of people with at least one vaccination and the prevalence of COVID per capita. Â Visually:

However, when I calculated the correlation between the percentage of the total population with at least one vaccine to the cases in the last 7 days per 100K population, the result was just -0.13 and the pairs in a graph are

So, there may be a slight correlation, but it isn't obvious from this data.