More than 80% of Americans 16 and older have some level of immunity against the coronavirus [CNN]

From CNN a couple of days ago, "More than 80% of Americans 16 and older have some level of immunity against the coronavirus, mostly through vaccination". Surely now is the time to allow vaccinated travellers into the US. https://edition.cnn.com/2021/09/02/health/us-coronavirus-thursday/index.html