PilotLZ thank you for offering a context for decreasing my level of cynicism. (About usefulness of some international groups...)
Coincidentally yesterday, during the first day of the EASA Annual Safety Conference which of course was conducted virtually, reference was made to the Aviation Health Safety Protocol issued by that agency and the ECDC. A link follows -- posted here just for information, without any claim that the joint effort by EASA and ECDC merits any specific level of approval or shrug.
(I observed yesterday that some of the presenters described work their organizations had done which, it appeared, had made good use of this document and its contents, but that's just an SLF/attorney's view, as typically from the cheap seats.)
"COVID-19 Aviation Health Safety Protocol", subtitle Operational Guidelines for the management of air passengers and aviation personnel in relation to the COVID-19 pandemic -- issued by EASA and ECDC as of June 30 2020
https://www.easa.europa.eu/sites/def...sengers_v2.pdf