This is originally started at Stanford. Great discussion and has also a Northern Europe Channel and many other subchannels. Please contact Einar Heiberg to get in invite.
Open Source COVID19 Medical Supplies Facebook group
They also maintain an excellent document with guidelines and links.
https://coronavirustechhandbook.com/
Contains multiple topics with global contributions including engineering projects.
The category “Pandemihack” in https://forum.makersofsweden.se/
Links are available on the project page.