My 2c....I deliver patients to hospitals all the time. I'd say about 75% of the time, the 'securtiy guards' are a joke. The few that actually have the physical ability to 'do something' are so few in number that it would be like trying to take on a mob on your own. When the ER staff are in the midst of 'hand to hand' (be it 'real H2H or just trying to put down the very strong and beligerant drunk), they are very happy to see the 'streetwise' medics who can help them as compared to the 'security team'.

If anything real DID happen in a hospital/institution.....I'd figure you are on your own. There are so many doors to be able to exit that they could never really lock them all down. Even if there were the 'electronic lockdown' capability....human (I'm too lazy) nature would have people doing things to bypass the locks for their normal everyday activities that when the real thing happened....many of the locks probably wouldn't work.....be prepared to take care of you and yours.....