### How does this work?

Covidvaxcount works by constantly checking the following three sources:

- The CDC Covid Vaccine Tracker
- Johns Hopkins Centers for Civic Impact vaccine data
- Individual state's vaccine dashboards, for example: Texas, New York, and Maine

This means that covidvaxcount.live is always the most up to date count of how many people have been vaccinated in the US.

### What is the number? Is it total doses administered?

The number calculated is described on the home page as: "members of the U.S. population who have received at least one dose of a COVID-19 vaccine". This means that the number represents how many people in the US have received *at least one* dose of a COVID-19 vaccine.

Therefore the number is different from "total doses administered", because the same person can receive two doses. Such a case would only count as one, because the number calculated is "number of people who have received the vaccine".