https://covidactnow.org/us/illinois-il/county/mc_henry_county/?s=30651923
That link allows you to check the rates in any county or metro area in the USA.
Let's try to calculate some actual risk.
Right now my county is experiencing about 8 new cases per day, per 100k people.
If we figure that the typical person is contagious for 5 days before they either isolate or start to recover, that means on any day there are (8 x 5) 40 people per 100k who are contagious. Which means 1 person in 2,500 is contagious.
There will also be asymptomatic people who can spread the disease; but we can use distancing and masking and vaxing to reduce that risk, so I go with the 1/2,500 number as a start.
Just because we are near someone who is infected does not mean we'll get sick.
That sounds pretty good. But the risk is cumulative- you can theoretically get exposed by being with 2,500 people at once, or 300 people 8 times, etc.
Can anyone refine my algorithm for the risk?
We are vaxed and boosted (September). Now that Pfizer and Moderna have asked approval for a second booster, and Israel has been doing that for several months without apparent problems; I'm hearing of people who "forgot" their vaccination card and getting a second booster now. Any thoughts?