What do you mean, patcaf, by "no organisation"? The site we are talking about is under the supervision of what used to be called the WRVS, who have a great deal of experience of this kind of thing, right back to WW2 at least. The volunteers will be doing things like driving people to appointments, doing shopping for vulnerable isolated people, delivering for pharmacies, phoning people who don't have any other callers. Do you think these things should stay undone? or added to the duties of ambulance drivers? They will all have be checked, which will take up time, but any who should not be near vulnerable patients will surely be weeded out. They won't be "let into hospitals" their stated duties stop at the hospital door.