A written statement by the WHO or the CDC should be scrutinized and criticized until it adds all those qualifiers and disclaimers you mentioned, but I can understand why someone making a phone call wouldn't go to such lengths.
Sure, if the phone call wasn't the V.P. advising state Governors on how to allay concerns. And to my mind, the addition of the word "confirmed" hugely changes the meaning of the statement.
The trajectory isn't going up. High positivity rate isn't relevant, unless you have evidence that the positivity rate is increasing over time.
Let's see. To take the States specified by the Washington Post as supposedly having the "worst week" in June: Alaska, Arizona, Arkansas, California, Florida, Kentucky, New Mexico, North Carolina, Mississippi, Oregon, South Carolina, Tennessee, Texas and Utah.
Alaska stands at 0.8 yesterday, and 0.8 at the start of the month. [NO SIGNIFICANT CHANGE]
Arizona at 12.4 yesterday, & 8.8 at the start of the month. [INCREASE]
Arkansas at 6.2 yesterday, & 5.2 at the start of the month. [INCREASE]
California at 5.2 yesterday, & 5.6 at the start of the month. [DECREASE]
Florida at 6.0 yesterday, & 5.3 at the start of the month. [INCREASE]
Kentucky at 4.1 yesterday, & 4.6 at the start of the month. [DECREASE]
New Mexico at 3.4 yesterday, & 3.5 at the start of the month. [DECREASE- MARGINAL]
North Carolina at 6.9 yesterday, & 6.8 at the start of the month. [INCREASE- MARGINAL]
Mississippi at 8.4 yesterday, & 8.5 at the start of the month. [DECREASE- MARGINAL]
Oregon at 2.9 yesterday, & 3.0 at the start of the month. [DECREASE- MARGINAL]
South Carolina at 7.9 yesterday, & 5.8 at the start of the month. [INCREASE]
Tennessee at 5.1 yesterday, & 5.1 at the start of the month. [NO SIGNIFICANT CHANGE]
Texas stands at 7.2 yesterday, & 6.6 at the start of the month. [INCREASE]
Utah at 5.7 yesterday, & 4.5 at the start of the month. [INCREASE]
So, quite a few increased positivity rates, some of which are pretty dramatic (Arizona & S. Carolina).
It's worth noting that the positivity rate for the US as a whole is going down. It stood at 8.37 yesterday, and 10.3 at the start of the month. But Pence's advice was to
State Governors.
As bad as they are, those metrics -- daily new cases, total active cases, and total overall cases -- do not do a good job of illustrating the
trajectory, which is our current sticking point. Daily new cases is useful for that, but only if combined with testing numbers, which brings us to the positivity rate I've been talking about.