What projects would be tractable that either EA institutions, philanthropic startup projects, or other institutions could do?
To figure out - does COVID cause long term damage to those who recover, how frequently, what kind of damage, how severe, and to whom?
And optionally: which person or institution may be well placed to execute on your idea?
The vast amounts of funding and research from every source that is currently starting / ongoing about COVID.
Examples:
https://www.covid19funding.org/
https://hub.jhu.edu/novel-coronavirus-information/research-preparedness/research-preparedness-covid-19-funding-opportunities/