EDIT: You may wish to update your client if you have not recently, as there is now an option to prioritize COVID19 or High Priority projects (previously you could only contribute to COVID by choosing "any disease"). I have not seen in the previous or current FAH version any auto-update options or notifications, so this looks to be a manual update if you wish to do so.
This is the thread for the unofficial HLP Folding@Home Team. (Goober said I could make an unofficial thread. Go Goober!

)
Just put team number 81206 and your User Name into Folding@Home's client.
To get Folding@Home, go to their
Download site.
FAQ Index is
here.
Configuration FAQ & settings descriptions is
here.
If you don't know what Folding@Home is, click
here.
EDIT:
To fight COVID-19: Select "any disease" as the disease to fight, and your spare CPU / GPU cycles will go towards fighting CV19.
EDIT2: FYI, there is now a dedicated drop-down for COVID-19 if you wish to focus solely on that (I leave mine to "any disease" but still frequently get COVID-19 jobs assigned).
https://foldingathome.org/2020/02/27/foldinghome-takes-up-the-fight-against-covid-19-2019-ncov/The 81206 for the team number is only necessary if you want credit to go to the HLP unofficial team.
If you want to protect contributions made under your username, you can click "Get a passkey", put in your desired username and an e-mail address, and get a passkey for your desired username and they will e-mail you a passkey. This is separate from the group you wish your credits to go towards, which does not require a passkey.
EDIT2: Stats are unreliable many times, you can use ExtremeOverclocking's site fjor stats
hereThanks to LTT Forum's excellent COVID-19 F@H known issues page
here.
Updates:
Number go up, but number must go up more

Number go up, but number must go up more
Agreed.

Relevant, didn't realize Folding@Home was running into shortages of F@H target servers (or indeed, that that was a thing at all) - Linus from LTT builds one from old parts with a few upgrades: