Sadly, it's often too late. Looks to be the case here, appears clearly a diagnosis delay. It does not take much for a skilled system to connect "airport worker" and the right lab readings together.
I can't imagine what these people would have gone through. They would have been given the "just a flu" treatment for some days, and then waited many more days for appointments. RIP.
PS: What you've said is pretty eye opening! This would amplify a lot of the diagnosis problems.