“It’s called quitting,” Penn wrote, according to a report shared byPeopleon Feb. 4.

“Quit for CORE.

Quit for your colleagues who won’t quit.

Sean Penn in CORE mask

Quit for your fellow human beings who deeply recognize that this is a moment in time.

A moment of service that we must all embody sometimes to the point of collapse.

“You rose up.

Sean Penn coronavirus vaccination site

And I will admit something.

It made me weep.

Although CORE is a nonprofit organization, Sean Penn’s staff members receive hourly pay and work eight-hour shifts.

Sean Penn backstage

Late last month, after hosting a number of testing sites throughout 2020, CORE began offeringCOVID-19 vaccinations.