To the point on test positivity rate remaining stable: non-COVID respiratory disease incidence is up significant (common cold, etc) - because they are no longer suppressed by behavior. There is a NYT article today with more information: https://www.nytimes.com/2021/07/22/well/live/colds-summer-immunity.html?action=click&module=Top Stories&pgtype=Homepage
It is possible that many people have non-COVID colds/coughs and are getting repeatedly tested, and that is offsetting the expected increases to the positivity rate.
To the point on test positivity rate remaining stable: non-COVID respiratory disease incidence is up significant (common cold, etc) - because they are no longer suppressed by behavior. There is a NYT article today with more information: https://www.nytimes.com/2021/07/22/well/live/colds-summer-immunity.html?action=click&module=Top Stories&pgtype=Homepage
It is possible that many people have non-COVID colds/coughs and are getting repeatedly tested, and that is offsetting the expected increases to the positivity rate.