Will NFL training camps be 'normal' this year? What we know about COVID-19 protocols, rules for unvaccinated players

What will NFL training camps look like this year? What happens if there is a positive COVID-19 test? How are protocols different for vaccinated and unvaccinated players?
https://www.espn.com/nfl/story/_/id/31884363/how-nfl-training-camps-work-2021-answering-big-questions-new-covid-19-protocols-rules-unvaccinated-players?utm_source=dlvr.it&utm_medium=blogger