In the words of Col. Sherman Potter: "Horse hockey!" If any pickleballer had tested positive TV would have shut down ALL sports courts. And that news would have been officially published somewhere, like the villagenews.com or elsewhere. Passive voice intros like "It has been reported..." supposedly absolve the OP from providing a reference. Notice not one person who agreed with the OP could/would provide copy from this alleged email.
Here's a reference from the pickleball web site:
Announcements - Play Pickleball-B Forever Young
Notice no mention of infection. Also, in the Rec News section of today's Daily Sun, there is an article about how the pickleball courts are one of the few rec options still open to us, although they officially are discouraging play.
Until someone posts something external to opinion, including email headers if they are used, this is just the spreading of another unsubstantiated rumor.