Australia trial 'traffic light' system in latest step to reopening borders - Could the US implement such a system for transatlantic travellers? [Sky News Australia]

I wonder if the US would implement such a policy for UK / European travellers. " The federal government could trial a 'traffic light' international border system which could see fully vaccinated individuals who pose no health risk allowed into the country." Sky News Australia https://www.skynews.com.au/details/_6259560374001