Wow that seems like a bit of an overstated response for MRSA. I worked in a children's hospital for the past 2 years and it wouldn't be unusual for us to have 3 or 4 kids in a 13 bed unit that were on contact precautions for MRSA. But we would never notify people they had been in contact with or shut down a whole unit. And MRSA isn't really any more virulent than regular S. aureus which is part of the normal skin flora. Its just that when an infection does occur its harder to treat due to the antibiotic resistance.