This very simply means we don't know anything

....produced in the thousands, and we have many to spare. We are helping other countries which are desperate for them. Likewise, after having been left little, we are now doing more testing than all other countries combined, and with superior tests. Face masks & shields,....

— Donald J. Trump (@realDonaldTrump) May 6, 2020

....to it, as appropriate. The Task Force will also be very focused on Vaccines & Therapeutics. Thank you!

— Donald J. Trump (@realDonaldTrump) May 6, 2020

It's way worse than that. Many people are getting tested multiple times (we know several people who have multiple tests, many positives are confirmed with a second test.) So 7 million tests is no way near 7 million people.

So 7 million tests have been analyzed.  That doesn't mean 7 million discrete people have been tested. It could mean 3.5 million have been tested.  It could mean more than that, but less than 7 million.  It could mean half of that half.  It could mean anything.

We don't know, and we probably have no way of knowing.  7 million is just a number, just an empty set of figures; just a great deal of zeroes.  It's meaningless.  Rather like the leadership in Washington.