A hackaton can be a fun excuse to experiment with random, but when I learned about the pan european hackaton against the corona virus organised by the EU commission I didn't know if I should to laugh or cry. Its like children playing doctor:
on edit: evidently I really like to be fair.
I.e. the platform that sprung up that crowdsources which stores etc closed and which didn't doesn't heal people, but has been quite helpful to find something I needed urgently. The grassroots effort that filled gaps in the PPE supply by scaling from a few hackerspaces doing 3D printed faceshield holders to organizing companies and community spaces to get parts injection-molded, material distributed, and shields assembled in the thousands is exactly about finding and connecting people with the right skills and resources. etc...
https://euvsvirus.org/challenges
In my experience this is a solid, well thought-out list, much more than just health related. It covers a lot of ground looking at the impact this virus most likely has.