In the absence of clear guidance from US government agencies right now, public minded researchers have created a document that summarizes, in one place, the best information we have. For people like congregational leaders trying to make decisions about worshiping indoors this coming winter, finding good information has been hard.
This is worth bookmarking.
From the beginning of the document:
The goal of these FAQs is to provide information to the general public in an efficient manner about how to prevent aerosol transmission of COVID-19, with the hope that this will allow more informed decision making by individuals or organizations. All of this information has been posted in Twitter and other forums, but can be difficult to find. Having multiple experts working together, and having the ability to update this information also improves its quality. These FAQs represent our best understanding at this time, and should always be similar or more stringent than information provided by CDC, WHO, and most regional & local health authorities. If your authority has a more stringent guideline than discussed here, follow that more stringent guideline.