I should've known by today this would be quite off track... lol Minicoop maybe you're better off aiming a camera at things!
Working with kids I'd get a flu shot at work but I don't think they were required - obviously our employer made them available because we'd likely be around a lot of sick kids and didn't need to have the flu getting passed around if it could be prevented. So I remember having had the flu years ago and seems like I was off work an entire week.
There have been plenty of other requirements for the type work I've done, getting a background check, taking first aid/infant CPR, etc. etc. so with some jobs there may be requirements - I guess someone would need to decide if they wanted to work there and meet the requirements or move on to something/someplace else.
From what I understand even if you'd get the flu, the shot would keep it to a milder case of it. I suppose most reasonably healthy adults may not need to worry about it too much but in a job working with sick people or kids I can see why it could be necessary to get one.
Wasn't there a childhood disease that hadn't been seen in years that came back? can't remember what it was, something that was thought to have been eliminated that doctors were seeing in kids again? Seems like unless there's a medical reason not to, that vaccines are a good preventive measure.