“consider suspending or at least decreasing use of a choir/musical ensembles and congregant singing, chanting, or reciting during services or other programming, if appropriate within the faith tradition....
web.archive.org/web/2020052219…
web.archive.org/web/2020052400…
The scientific basis of concern is sound. As a biologist explains in an analyzing a case where a choir rehearsal at a church led to 45 people getting covid: ...
(Thanks to Matt Schaefer for tip on CDC change.)