It seems that if COVID causes long term fatigue (has been speculated but no strong evidence that I'm aware of) this could be negative for the EA community - i.e. if leaders of EA related orgs or key employees or other key EA contributors had fatigue issues and lower personal output, that seems bad.
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?
This seems to be very low on neglectedness, and not particularly high on tractability either.
What makes you say it's low on neglectedness?
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/