* List of Each Vaccine with information on how it works, links to studies, further info

* Bloomberg.com – Map of the U.S. with number vaccinated so far State by State, as well as U.S. total

* John Hopkins Vaccine Tracker – This tool shows key county-level COVID-19 case and testing data with the option to overlay it against demographic information—including race/ethnicity and poverty rates.

* Info on distribution of Moderna Vaccine

* Info on distribution of Pfizer Vaccine

* Explanation of different types of vaccines

* PDF file from Census.gov on U.S. population

* Mayo Clinic on Herd Immunity

* Vox.com explains Herd Immunity (as simply as possible)

* How to calculate Herd Immunity Threshold