QUESTION: US is testing less than 5k/million while S. Korea, Germany, Greenland, Hong Kong...

[FBaggins]

6. It would imply "already tested"

It's just that the same figure can be expressed in two ways. But if you combine them it says something entirely different.

I had a student once come out of driver's training believing that he had to keep a following distance of two seconds per ten MPH that he was traveling. The old rule of thumb is actually "two seconds OR two car lengths per 10 MPH" - which both give (very roughly) the same following distance. But if you read it as "two seconds per 10 MPH" you would get a following distance of over 1,000 feet at 60 MPH.

If we say ".5% per million" and there are 327 million people in the US... .5 X 327 = 163.5. We obviously haven't tested over 150% of the country. While "5K/million" and ".5%" are the same number (about 1.6 million tests).