This article is a case study in the effect that distributed manufacturing and crowd-sourcing can have in the physical world. You can follow their day-to-day updates of these makers supporting the COVID-19 response at the link below.
https://www.3dprintingmedia.network/covid-19-3d-printed-valve-for-reanimation-device/
If you own a 3D printer and want to be an asset to the community, their team has provided a form you can fill out to make your engineering skills a community resource.
Note that your information will be public, so you may want to setup a separate email to be safe. Your information from the link above will populate into this public google document.