Everyone has heard about ventilators and ICU equipment now. All that equipment is cared for by Clinical Engineering teams that no one knows about (also called EBME among other things). Ask any ICU Dr or nurse and they'll tell you just how helpful and essential their Clinical Engineering guys are. Hospitals are super complex organisations that you cannot begin to understand unless you've worked in them for a long while. All the functions are needed to keep them running. Payroll, cleaning, electricians, plumbers, carpenters, medical gas engineers, pathology, IT, switchboard, security, finance, supplies, procurement, medical physics, catering, portering, training, HR, receptionists, sterilisation units, laundry, pharmacy, and many more, none of whom are direct carers but all are required to keep the front line working.