Norfolk - it would be interesting to know if it is a CAA thing or a company policy - either way it hasn't been thought out - it might protect the pilots but what about the rear crew? Unless everyone in contact with the casualty is in the 'ebola-style' sealed suits there will always be a risk and that kit is not standard on a SAR cab.
The problem with meningitis is that often the diagnosis is made late and in a child that can mean that every minute between diagnosis and correct treatment is vital - it tends to cause infection in the limbs first if I remember correctly.
Are we about to go down a path where the crew are not allowed to be put at any risk when performing their duties? It certainly doesn't sound like SAR as I know it.